Science Vs

Collagen peptides!! Can they make you look younger and be healthier? It feels like everyone wants to be bursting with collagen, and apparently the way to do it is by scooping up that white powder of collagen peptides and guzzling it down. Do that, and — according to the wellfluencers — not only will your skin be as bouncy as a baby's bottom, but you'll also be stronger and you'll heal from injuries faster. But of course, not everyone is on the collagen train. There are the collagen haters, who say that eating collagen is a load of baloney. So who's right? To find out, we talk to dietetics Professor Clare Collins, dermatologist Dr. Natalia Spierings, exercise physiologists Professor Luc van Loon and Professor Keith Baar, neutromuscular physiologist Dr. Robert Erskine, as well as sports performance consultant Dr. Dana Lis. Find our transcript here: https://tinyurl.com/ScienceVsCollagen In this episode, we cover: (00:00) Collagen peptides are EVERYWHERE (02:52) Why is collagen important? (05:25) What are…

Our brains go completely WILD when we go through our teenage years. It’s a time where it feels like every disagreement with our parents turns into World War III, and every idea that could get us killed sounds like the most fun we could ever have. In this episode, we get into the science of what the brain is doing during the teenage years with clinical psychologist Dr. Lisa Damour. Lisa co-wrote the college textbook “Abnormal Psychology” and was a consultant on Disney's “Inside Out 2.” She takes us deep into the developing brain to explain what makes teens tick. Plus, we talk about mental health, how boys and girls are struggling in different ways, and tips for anyone who has big feelings. Find our transcript here: https://tinyurl.com/ScienceVsTeenBrain Check out Lisa Damour’s podcast, Ask Lisa: The Psychology of Raising Tweens & Teens, here: https://open.spotify.com/show/2GIh790via4L7oGAJ2mz1b In this episode, we cover: (00:00) Meet Lisa Damour (05:33) The teenage brain (11:20) Big feelings, what they mean,…

Stress! We’re all feeling it. And besides just feeling crappy, we’re also told that stress can wreak havoc on our bodies. The internet has a million solutions: vagus nerve stimulators, deep breaths, or a hot sauna! If that doesn’t work, maybe a cold plunge? But what does the science say about all this — what works to lower our stress? And is it really THAT bad to be stressed out? We dive into the research to find out, with psychology Professor Mark Seery, psychology Professor Jeremy Jamieson, and anatomist Dr. Theresa Larkin. Find our transcript here: https://tinyurl.com/ScienceVsStress In this episode, we cover: (00:00) We’re all stressed out! (02:37) Is stress that bad for us? (13:55) A healthier stress response (22:32) How our vagus nerves are involved in stress (25:57) Can we “hack” our vagus nerves? (30:42) What else can relieve stress? This episode was produced by Meryl Horn, with help from Michelle Dang, Rose Rimler, and Ekedi Fausther-Keeys. We’re edited by Blythe Terrell. Wendy Zukerman is the…

Could artificial intelligence really wipe out humanity? Claims that AI poses an existential threat are going gangbusters. AI agents from OpenAI recently hacked into another company, Hugging Face, which has people talking about whether AI can go “rogue.” And some current and former AI company employees are raising the alarm. CEOs have called for a slowdown, and one Anthropic employee just quit, saying that the companies creating this tech are putting us all at risk — and adding that “the people building AI earnestly believe that it could kill us all by the end of the decade.” So — are we really creating a monster? Could AI escape human control and take us all out? If so … how?! And are these scary claims just a distraction from the stuff that AI is already being used for out in the world? We talk to cyber security expert Professor David Parry, philosopher Dr. Nick Bostrom, and scientist Dr. Michael Vermeer to find out. Find our transcript here: https://tinyurl.com/ScienceVsAIApocalypse In this episode, we…

Bugs are disappearing at alarming rates, scientists are telling us. Bees, butterflies, beetles: all of them have been dropping like flies. And scientists say there are a bunch of reasons to care about this — for example, fewer bugs means less pollination, which means less pasta in your pantry. But recently, some have suggested that all these scientists crying out about the insect apocalypse might just be crying wolf. They say that the math isn’t math-ing and that the insects are doing all right. And this has been bugging us! So we called up Dr. Jessica Ware, an entomologist and a curator at the American Museum of Natural History, to find out what’s going on here. And Jessica also specializes in dragonfly lovemaking, so of course, we had to ask about that too. Find our transcript here: https://tinyurl.com/SVInsectApocalypse In this episode, we cover: (00:00) Meet entomologist Dr. Jessica Ware (03:27) Dragonflies: Origins and sex lives (08:55) The insect apocalypse: How bad is it? (19:02) What’s causing the…

Protein is everywhere — tons of us are trying to cram more of it into our diets, and it's showing up in our lattes, our snack bars, even our popcorn. But just as we’re getting on board with protein-maxxing, a bunch of headlines have started saying the opposite: that eating LESS protein could actually help you live longer. So what's going on here?? Should we be piling on the protein — or pulling back? And could going too low actually be dangerous? We talk to biologist Prof. Dudley Lamming and exercise physiologist Prof. Stuart Phillips to find out. Note: This episode mentions calorie restriction. Please take care when listening, and here are some resources: National Association of Anorexia Nervosa and Associated Disorders (ANAD) helpline: 1(888)-375-7767 Crisis support: United States: US National Suicide Prevention Lifeline Dial 988 (Online chat available); https://www.crisistextline.org/text-us/ Text “HOME” to 741741 Australia: Lifeline 13 11 14 (Online chat available) Canada: Call or text 988 United…

Sunscreen is supposed to protect us from dangerous stuff like cancer, but all over social media, people are saying that we’ve been getting it all wrong. We’re being told that our sunscreen is full of toxic chemicals, that wearing it could mess with our vitamin D levels — even that sunscreen itself actually increases our risk of skin cancer. So, what can the science tell us here? Should we toss our SPF-filled creams and sprays in the bin?? And could the answer here be different depending on your skin tone? We talk to researchers Dr. Brandon Adler, Prof. Rachel Neale, and Dr. Adewole Adamson to find out. Find our transcript here: https://tinyurl.com/ScienceVsSunscreen In this episode, we cover: (00:00) The internet freak-out over sunscreen (05:06) Is sunscreen toxic? (20:46) Does sunscreen mess with vitamin D? (29:29) Does sunscreen work to prevent skin cancer? (34:40) Do people with darker skin need sunscreen? (44:38) How to wear sunscreen correctly This episode was produced by Michelle Dang, with help from…

Hank Green is one of the most beloved science creators on the interwebs. He’s been making videos for almost 20 years, spanning LOTS of eras of the Internet, from YouTube prank videos to TikTok dance challenges to AI slop. In this episode, Wendy sits down with Hank to talk about this wild ride. They reminisce about his path to YouTube stardom, and they’ll pull back the curtain on social media algorithms — how they’ve changed, and the sneaky ways they draw us in. And while Hank has been publicly fighting off internet trolls, he’s also been dealing with his own personal battle with cancer. He takes us through what’s changed for him since he got diagnosed, and the science he learned about pee and chemotherapy along the way. Find our transcript here: https://tinyurl.com/ScienceVsHankGreen In this episode, we cover: (00:00) Hank Green’s journey to YouTube (06:26) How ‘going viral’ has completely changed (11:58) How social media captures your attention (23:47) What Hank is and isn’t worried about with AI (29:33)…

Is an electrical substation contributing to injuries on the San Francisco 49ers?? A bunch of people on the internet seem to think so, claiming that electromagnetic field waves could be to blame for players getting hurt. We partner with the Pulitzer Prize-winning journalists at Pablo Torre Finds Out to get to the bottom of it. We talk to Peter Cowan, Dr. Ken Karipidis, and Dr. Zachary Binney. Find our transcript here: https://tinyurl.com/SVPTFO49ERSEMF Watch and subscribe to Pablo Torre Finds Out here: https://www.youtube.com/@PabloTorreFindsOut This episode was produced by Rose Rimler, Wendy Zukerman, Chris Tumminello and Bradley Campbell, with help from the rest of the Pablo Torre Finds Out team and the Science Vs team: Ekedi Fausther-Keeys, Meryl Horn, and Michelle Dang. We’re edited by Blythe Terrell. Wendy Zukerman is the executive producer. Fact checking by Marlowe Starling. Video editing and sound mix by Bobby Lord. Music written by Bumi Hidaka, Peter Leonard, Emma Munger and Bobby Lord. Thanks to the…

If you have ever tried to lose weight only to find the weight crept back on, you’re not alone. In fact, for tons of people, this happens over and over again. This is called “weight cycling,” and a bunch of influencers are saying that this is terrible for us. They say that it can ruin your metabolism forever and that it can lead to stuff like diabetes and scary muscle loss. So could that be true?? And why does this happen at all? We find out with nutritionist Prof. Faidon Magkos, immunologist Prof. Alyssa Hasty, and health policy researcher Dr. Jamie Hartmann-Boyce. Note: In this episode we discuss weight and weight loss. Please take care when listening, and here are some resources: National Association of Anorexia Nervosa and Associated Disorders (ANAD) helpline: 1(888)-375-7767 Crisis support: United States: US National Suicide Prevention Lifeline Dial 988 (Online chat available); https://www.crisistextline.org/text-us/ Text “HOME” to 741741 Australia: Lifeline 13 11 14 (Online chat available) Canada: Call…

Will you hit play on this episode?? It feels like that decision is totally within your control — but what if it’s not? What if free will is just an illusion? Lots of people are using science to say that free will is a trick of the mind, that whether or not you listen to this episode, or eat a taco, or do a silly dance right now — it’s all predestined. But do we really have science receipts for that? We find out by talking to neuroscientist Prof. John-Dylan Haynes and theoretical physicist Prof. Sean Carroll. Find our transcript here: https://tinyurl.com/ScienceVsFreeWill Check out Sean Carroll’s podcast, Mindscape, here: https://preposterousuniverse.com/podcast/ In this episode, we cover: (00:00) When you remember you have free will (02:21) What is free will? (04:26) The argument against free will(18:07) The argument for free will This episode was produced by Meryl Horn with help from Rose Rimler, Ekedi Fausther-Keeys, Michelle Dang and Wendy Zukerman. We’re edited by Blythe Terrell. Wendy Zukerman is the…

The internet tells us that narcissists are everywhere — and that the problem is only getting worse. It’s like narcissism is oozing out of our celebrities, politicians, partners, parents, maybe even ourselves?? So today, we’re taking a long look in the mirror to find out: are we all a bunch of narcissists? And what should we do if we think someone in our life is a narcissist? We find out by talking to a real narcissist, Lee Hammock of the social media platform “The Self Aware Narcissist” as well as psychologists Prof. W. Keith Campbell, Prof. Kali Trzesniewski, and Dr. Craig Malkin. [REBROADCAST] Find our transcript here: https://bit.ly/ScienceVsNarcissistsRerun We want to hear your ideas for new episodes of Science Vs! Tell us via: Instagram at science_vs X at @sciencevs Bluesky at sciencevs Email at ScienceVsTeam@gmail.com Voicemail at +1 774-481-1238‬ This episode does mention depression. Here are some crisis hotlines: United States: US National Suicide Prevention Lifeline Dial 988 (Online chat available);…

Raw milk is having a major moment, with fans claiming it’s a gut-healing superfood that can prevent everything from asthma to allergies. But others are like HOLD ON — we pasteurize milk to make it safe! Drinking raw milk can kill you. So, who’s right? Could there be some benefits to guzzling milk straight from the teat? Or is it a terrible idea? We talk to food science Prof. John Lucey and pediatric allergist and immunologist Prof. Christine Seroogy to find out. Find us on YouTube at ScienceVsPodcast! You can also find the show on Instagram at science_vs and Wendy on TikTok at @wendyzuk. Find our transcript here: https://tinyurl.com/ScienceVsRawMilk In this episode, we cover: (00:00) Some people online claim raw milk is GREAT for you (05:36) What is pasteurization?? (07:15) Is raw milk good for your microbiome? (11:06) Can raw milk help prevent allergies and asthma? (24:31) What are the risks of drinking raw milk? This episode was produced by Blythe Terrell, with help from Ekedi Fausther-Keeys, Meryl Horn,…

Today we’re revisiting caffeine. It’s a drug that tons of us take every day. So, is that a bad thing?? What is it really doing to our bodies and our brains? Plus — if we get it in the form of energy drinks, is that super dangerous? We talk to Dr. Astrid Nehlig, Prof. Gregory Marcus, and Prof. Sachin Shah. [REBROADCAST] Find our transcript here: https://tinyurl.com/ScienceVsCaffeine In this episode, we cover: (00:00) Our love/hate relationship with caffeine (04:40) How coffee affects our gut (07:29) How coffee affects our brain (12:59) How coffee affects our sleep (17:58) Coffee makes us go vroom vroom vroom! (20:45) Are we caffeine addicts?? (28:15) Are energy drinks dangerous? This episode was produced by Rose Rimler, with help from Wendy Zukerman, as well as Nick DelRose, Joel Werner, and Michelle Dang. We’re edited by Blythe Terrell. Fact checking by Sarah Baum. Mix and sound design by Bumi Hidaka. Music written by Bobby Lord, Bumi Hidaka, Emma Munger and Peter Leonard. Special thanks to all the…

A group of scientists meet a very unusual woman. A key part of her brain isn’t working: the amygdala. This is the part of the brain that we think is responsible for feeling fear. And in fact, this woman does seem pretty fearless. Researchers test her fear response using some very unconventional methods, but she takes everything in stride. Then, finally, they stumble onto the one thing that makes the woman who can’t feel fear absolutely panic. We scare up some science with neuropsychologist Dr. Justin Feinstein. Find our transcript here: https://tinyurl.com/ScienceVsWomanWhoFeltNoFear In this episode, we cover: (00:00) Meet the Woman Who Felt No Fear (04:38) Fear and the Amygdala (10:27) Scientists Start Running Experiments With the Woman Who Felt No Fear (11:48) Scientists Try to Scare SM (12:59) Scientists Try to Scare Her With Snakes (16:08) Scientists Try to Scare Her with a Haunted House (19:58) The Risks of Feeling No Fear (25:46) Scientists Try a New Approach (34:20) How Breathing Too Much Carbon…

Peptides are huge right now. Influencers are telling us they can work wonders for all sorts of stuff. Struggling with an annoying injury that won't heal?? Belly fat that's pissing you off? Low energy? Gut issues?? There’s a peptide out there for you. People are buying peptides off the internet and injecting themselves with them, saying it's life changing. But away from the internet hype, there is actually a potential revolution happening in medicine around peptides. So we’re finding out what scientists are excited about here, and we look deeply at the science behind two massive peptides: BPC-157 and MOTS-c. And we’ll also look at the risks: Could peptides give you cancer? On this episode we talk to Dr. Hassy Cohen, Dr. Keith Baar, Dr. Dhruv Khullar and Dr. Cory Mayfield to get to the bottom of this. Find us on Youtube! We're at https://www.youtube.com/@ScienceVsPodcast Find our transcript here:https://tinyurl.com/ScienceVsPeptides In this episode, we cover: (00:00) Peptides are everywhere right now (03:56 )…

The Trump administration is rolling back restrictions on air pollution in the U.S., and some experts say this could affect the health of millions of people. And what makes air pollution especially dangerous is that we often can’t see it at all. So today, we’re going back to the story of Ella Kissi-Debrah, a little girl who suddenly got sick and landed in the hospital. In this episode, her mom, Rosamund, takes on the fight to find out what exactly happened to Ella. And the answer has BIG implications — for us all. We’ll hear from Rosamund Adoo-Kissi-Debrah and Professor Stephen Holgate. Find our transcript here: https://tinyurl.com/ScienceVsAirPollution In this episode, we cover: (00:00) Ella’s story (13:02) The campaign and investigation (21:01) Why air pollution is so dangerous (25:39) Accountability and change This episode was produced by Ekedi Fausther-Keeys with help from Rose Rimler, Wendy Zukerman, Michelle Dang, Meryl Horn, and Courtney Gilbert. We’re edited by Blythe Terrell. Wendy Zukerman is the…

Ibogaine. Fans say this psychedelic is a game changer for treating a bunch of mental health conditions — that even a single trip to your friendly ibogaine clinic could cure you of lifelong struggles with addiction. And recently President Trump signed an executive order fast-tracking research into this psychedelic drug. But how well does it really work? And is it safe?? To find out, we talk to clinical psychologist Dr. Alan Davis and psychiatrist Prof. Paul Glue. Some resources for help with substance use and domestic violence: Substance use and mental health concerns (U.S.): SAMHSA National Helpline: 1-800-662-HELP (4357) National Domestic Violence Hotline (U.S.): 800.799.7233 or www.thehotline.org Find international resources and more at spotify.com/resources Find our transcript here: https://tinyurl.com/ScienceVsIbogaine In this episode, we cover: (00:00) The hot new psychedelic on the block (07:25) Can ibogaine help with opioid addiction? (18:31) How does ibogaine help people? (20:50) How long do the…

A weird virus has popped up on a cruise ship, and it’s making a bunch of us nervous. It’s a type of hantavirus called Andes virus, and scientists think that it’s infected almost a dozen people so far — three of them have died. And now people are getting off the boat, some of them going into government quarantine, but some of them traveling home. And people are like, wait … this all sounds VERY familiar … from the early days of Covid. So — how scary is this? Could this hantavirus be the next pandemic?? We talk to Prof. Michelle Harkins, Prof. Ann Sheehy and Dr. Neil Vora to find out. Find our transcript here: https://tinyurl.com/ScienceVsHantavirus In this episode, we cover: (00:00) Hantavirus shows up on a cruise ship (03:11) What happens if you get sick with hantavirus? (09:32) How does hantavirus spread? (14:05) How good is this hantavirus at spreading? (26:08) Is this hantavirus going to cause the next pandemic? This episode was produced by Michelle Dang, with help from Blythe Terrell, Meryl Horn, Rose…

Tons of us are inked — one in three American adults has a tattoo — but lately, we’ve been hearing that tattoos are actually bad for us. We’re told that they mess with our immune system and could even lead to cancer. Can that be true?! Plus, are there any upsides to having a tattoo? We talk to immunologist Dr. Santiago González, epidemiologist Dr. Christel Nielsen, and psychologist Prof. Viren Swami. Find our transcript here: https://tinyurl.com/ScienceVsTattoos (00:00) Tattoos Under Attack (02:03) Getting Under Our Skin (11:38) Do Tattoos Cause Cancer? (18:50) Should You Get Them Lasered Off? (20:53) The Benefits of Tattoos This episode was produced by Rose Rimler, with help from Blythe Terrell, Ekedi Fausther-Keeys, Meryl Horn, and Michelle Dang. Wendy Zukerman is our executive producer. We’re edited by Blythe Terrell. Fact checking by Diane Kelly. Mix and sound design by Bumi Hidaka and Bobby Lord. Music written by Bobby Lord, Bumi Hidaka, So Wylie, Emma Munger and Peter Leonard. Special thanks to all the…

We keep hearing that we need to be BORED more, with people online swearing that boredom can work magic — restoring your mind, and even supercharging your creativity. So, is boredom secretly good for us? We talk to cognitive neuroscientist Prof. James Danckert and organizational psychologist Prof. Guihyun Park to find out. Find our transcript here: https://tinyurl.com/ScienceVsBoredom In this episode, we cover: (00:00) They say we need more boredom (02:06) This is your brain on boredom (12:30) Does boredom push us into creativity? (22:08) Should you try to be more bored? (23:53) When you give your brain time to rest This episode was produced by Michelle Dang, with help from Meryl Horn, Rose Rimler and Ekedi Fausther-Keeys. Wendy Zukerman is our executive producer. We’re edited by Blythe Terrell. Fact checking by Erica Akiko Howard. Mix and sound design by Bobby Lord. Music written by Bobby Lord, Bumi Hidaka, So Wylie, Emma Munger and Peter Leonard. Science Vs is a Spotify Studios Original. Listen for free on…

Headlines have been screaming about a new study suggesting that vaping could cause cancer — and that vaping could be just as dangerous as cigarettes. And if this were true, it would be a HUGE deal. We’ve been hearing for years that vaping is a safer option — and can help you quit ciggies. But the new paper has run up against angry criticisms from other scientists, with some calling the paper "misleading" and "problematic." So what’s going on?? Do scientists still think vaping is safer than cigarettes? How well do vapes actually help people quit smoking? And could Big Tobacco be behind the scenes, clouding the truth about all of this?? We get help sorting it out from Professor Bernard Stewart, Professor Lion Shahab and Professor Becky Freeman. Find our transcript here: https://tinyurl.com/ScienceVsVapingCancer In this episode, we cover: (00:00) Vaping world set alight by new study (02:50) Why Some Scientists Have Linked Vaping to Cancer (07:45) Why Some Scientists Pushed Back Against Vaping-Cancer Claims…

Lots of us love — or love to hate — running. And we do it because it’s supposed to be healthy, right?! But then we hear tons of stories about runners getting hurt — sometimes so badly that they have to hang up their sneakers. And there are people on social media going even further, claiming it’s one of the worst things we can do for our bodies. So IS running secretly bad for us? And could too much of it actually bring you closer to a heart attack? We’ll explore the science on all of that, and we’ll also dig into runner’s high: What is going on in the brain to cause this feeling? With help from Dr. Rasmus Østergaard Nielsen, Professor Duck-Chul Lee, and Dr. Michael Siebers, we look at the science to find out if running is the key to a healthy life or if there are peer-reviewed reasons to be a hater. Find our transcript here: https://tinyurl.com/sciencevsrunning In this episode, we cover: (01:48) What’s the deal with running injuries? (10:51) How to get hurt less (15:03) The secret to a longer life (19:34)…

We’re learning that people can spread the virus when they don’t have symptoms. But how often does that actually happen? We talk to Mark Jorgensen, clinician-scientist Dr. Vivek Naranbhai and CDC epidemiologist Dr. Mateusz Plucinski. Also: KOALA POP SONGS!! Here’s a link to our transcript: https://bit.ly/2zNX1q7 This episode was produced by Michelle Dang with help from me Wendy Zukerman, Laura Morris, Rose Rimler, Meryl Horn and Sinduja Srinivasan. We’re edited by Blythe Terrell with help from Caitlin Kenney. Fact checking by Lexi Krupp. Mix and sound design by Peter Leonard. Music written by Peter Leonard, Marcus Bagala, Emma Munger, and Bobby Lord. A big thanks to all the researchers we got in touch with for this episode, including Prof Gerrado Chowell, Dr. Natalie Dean, Dr. Sandra Uitdenbogerd and Caroline Pegram. And special thanks to the Zukerman family and Joseph Lavelle Wilson. Learn more about your ad choices. Visit podcastchoices.com/adchoices

The moon race is back! NASA’s Artemis II mission just sent four astronauts around the moon. And other countries — and billionaires — are lining up to take a crack at returning to the moon too. But why are we really going? Some say this is a lunar gold rush, that countries want to mine the moon for resources. Others are saying the real reason to go to the moon today is that it’ll help us get to Mars. To find out, we talk to engineer Dr. Angel Abbud-Madrid, physicist Prof. Nicolle Zellner, and astronomer Prof. Gregg Hallinan. [REBROADCAST] Find our transcript here: https://tinyurl.com/ScienceVsGoingBackToMoon UPDATE 4/9/26: We updated this episode with information about more recent efforts to mine Helium-3 from the moon. This episode was produced by Meryl Horn and Ekedi Fausther-Keeys, with help from Wendy Zukerman, Rose Rimler, Meryl Horn, and Michelle Dang. We’re edited by Blythe Terrell. Fact checking by Diane Kelly. Mix and sound design by Bumi Hidaka. Music written by Bumi Hidaka, Peter Leonard, Emma…

The apps on our phones do an amazing job of sucking us in. In fact, a big court case just found that some of these companies should be held responsible for basically designing products to be addictive. And that might not be shocking for lots of us, who feel the pull of these algorithms every day. So, is there anything we can do to help us put down our phones?? Tons of solutions are bandied about: Buy this special device to stay off your phone! What we really need to do is up the friction! Or go hardcore — just get a flip phone! But what actually works to stop scrolling? We dive into the science to find out, with help from computer science and engineering researcher Dr. Jaejeung Kim and psychologist Dr. Lea-Christin Wickord. Find our transcript here: https://tinyurl.com/ScienceVsStopScrolling In this episode, we cover: (00:00) The Apps Got Us Trapped (04:21) Yes, it’s the scrolling that’s to blame (06:18) The Hardcore Approach (11:45) The Gentle Nudge (14:09) What if we up the friction? (19:59) Is greyscale…

Today, best-selling author and nerd Mary Roach joins us to talk all about sex. We’ll uncover the secrets of the female orgasm (does “upsuck” exist?), detail the bizarre methods of pioneering sex researchers like Masters and Johnson (including a famous penis camera), and get into the nitty-gritty of how to sexually stimulate a pig in Denmark. Plus, Mary tells us what it's like to have sex while getting an ultrasound — all in the name of science. Mary’s new book, Replaceable You: Adventures in Human Anatomy, is out now. Find our transcript here: https://tinyurl.com/ScienceVsMaryRoach In this episode, we cover: (00:00) Meet Mary Roach, one of our favorite nerds (22:31) The masturbating fetus (27:53) Mary bonks in the lab (47:31) Oddball questions This episode was produced by Wendy Zukerman, with help from Meryl Horn, Ekedi Fausther-Keeys, Michelle Dang, and Rose Rimler. We’re edited by Blythe Terrell. Video editing and sound design by Bobby Lord. Music written by Emma Munger, So Wylie, Peter Leonard, Bumi…

Colorectal cancer has long been thought of as a disease of older folks. But that's changing — fast. Rates in older people are actually going down, and more and more people under 50 are getting this disease. And a surprising number of them are dying from it. So what’s going on here? We dig into why young people are getting hit harder. Plus, we often hear that you should watch out for changes in your poo. But what changes?? We’ll find out. We talk to gastrointestinal medical oncologist Dr. Michael Foote and cancer biologist Prof. Ludmil Alexandrov. Find our transcript here: https://tinyurl.com/ScienceVsColonCancer In this episode, we cover: (00:00) Becca’s story (05:52) What the rise looks like (09:06) Is there something different about this cancer? (14:13) What symptoms to look out for (17:41) Why is this happening? (21:34) The hunt for explanations This episode was produced by Michelle Dang, with help from Rose Rimler, Meryl Horn and Ekedi Fausther-Keeys. Wendy Zukerman is our executive producer. We’re…

People are reporting a very strange phenomenon: They say that when their nipples get touched, they feel this weird sinking feeling. People describe it like being homesick, or hung over. Some feel anguish and despair, others call it dread. The condition has a name: "Sad Nipple Syndrome." But how could just touching a nipple set off all of these feelings?? To get to the bottom of this booby baffler, we go deep into the mysteries of anatomy and through a world of hormones and nipple erections. You might never look at your nipples the same way again! Distinguished Professor Barry Komisurak and Lactation Specialist Alia Macrina Heise join us. Find our transcript here: https://bit.ly/ScienceVsSadNippleSyndrome In this episode, we cover: (00:00) Meet Sad Nipple Syndrome (05:14) Why is Nipple Play Arousing? (09:58) Dysphoric Milk Ejection Reflex (D-MER) (15:14) How Milk Ejects From a Booby (17:33) Is Oxytocin to blame? (19:36) Suspect Number 2: Dopamine (20:52) What might help This episode was produced by Wendy…

UPDATE [June 30, 2026]: If we had our time again we would have produced this episode differently. We got carried away with the wildness of the story, from a scientific perspective, and didn't take time to really think about the fact that this is the story of a 15-year-old, who would have been going through a really difficult time. Many of our listeners rightly pointed this out, and we appreciate it." We have changed some of our language in this episode based on the feedback – we replaced all references to woman to teenager or girl, we cut some moments that we viewed as insensitive, and we removed the reference to the girl not being intersex, as some folks with the condition Mayer-Rokitansky-Küster-Hauser syndrome do identify as intersex. Here’s the story: It's 1988 in Lesotho, and doctors at a hospital see something they thought was impossible. A 15-year-old girl shows up pregnant and in labor, but she's missing something pretty crucial to her delivery: a vagina. So — how did this happen? We speak with Dr.…

We’ve all been there. Feeling stuck with a problem because no one in our life can relate. Or because the one person we need to talk to … won’t. Or can’t. Enter Yowei Shaw and the show Proxy. Proxy is built on a simple idea: no one is ever as alone with their problem as they think. So Yowei brings in a proxy, a perfect stranger, to help her guests work through their dilemma. Today we’re sharing the case of Brian, a journalist whose mother-in-law has Alzheimer's. Even though Brian knows she can’t help misremembering things, he can’t stop losing his patience with her, and with himself. This episode was mixed for Science Vs by Bobby Lord. – Find Proxy here. Resources from Claudia on dementia caregiving, caregiving in general, and acceptance and commitment therapy (ACT): On understanding dementia Dementia Reimagined: Building a life of joy and dignity from beginning to end by Tia Powell (and this accompanying Fresh Air episode) On preventing/addressing emotional or behavioral changes associated with dementia When…

Forget the questionable relationship advice from internet influencers. Today, we’re diving into the science of lasting love, fighting, and "red flags” to find out what really matters for a healthy relationship. We’ll find out what it means to fight well with your partner. And we’ll also look at the signs that a relationship might become dangerous or abusive. For all this, we speak with Professor Ben Karney, Dr. Megan Haselschwerdt, Dr. Elizabeth McLindon and Matt Brown. U.S. National Domestic Violence Hotline: 800.799.7233 or www.thehotline.org Find international resources and more at spotify.com/resources Find our transcript here: https://bit.ly/ScienceVsIsYourRelationshipOK In this episode, we cover: (00:00) Influencers love giving advice (02:36) How to have a ‘healthy fight’ (09:44) If you fight badly, will you get divorced? (13:55) What are ‘red flags’? (21:01) Red flags you should watch for (28:23) Approaches to try to change abusive partners (34:00) Why do people try to control their partners? (37:57)…

Federal agents have descended on Minneapolis in the U.S., and things have gotten chaotic — and deadly. The Trump administration says the agents are there to enforce immigration law, but officers have shot three people so far, killing two, and are using tear gas and smoke on protesters. So today, we’re looking at the potential health impacts of tear gas. We’ll talk about what we do — and don’t — know about potential long-term effects of this stuff. And we’re also looking into research on the mental health effects of immigration raids. We speak to Dr. Jennifer Brown, Dr. Carlee Toddes, and Dr. William Lopez. This episode does mention mental health issues. Find resources here: spotify.com/resources For more on William Lopez’s research on ICE raids, check out his new book, Raiding the Heartland https://www.press.jhu.edu/books/title/53706/raiding-heartland?srsltid=AfmBOoperKoqv48ZYzaHfQ87nM2xI3QiAbI7lo2wLqt5BykNo-47cHxS Find our transcript here: https://bit.ly/3MbC1Py Transcripción en español:…

There's claims out there that all kinds of things can make us happy in life, from making money to having kids to buying your dream home. But what actually works?? What does it take to have a happy life?? Professor Bob Waldinger is a psychiatrist at Harvard who has spent more than two decades as the director of this amazing study. It has tracked hundreds of people for decades and is the world's longest scientific study into happiness. So we're gonna find out what a lot of us get wrong in searching for the good life. Where we should be putting our time and attention. And we'll get this huge insight into how we can all be happier — and healthier. Find our transcript here: https://bit.ly/ScienceVsHappiness In this episode, we cover: (00:00) What makes us happy? (01:48) The world's longest study into happiness (07:25) The biggest finding of the study (13:18) How do you build good relationships? (18:26) How did Bob get happier?? (21:53) How childhood adversity changes us (24:12) Does having kids make you happy?…

The U.S. just made a big change to its vaccine recommendations, cutting back on the number of shots it will routinely recommend for kids. The government says it wants to "better align" with countries like Denmark. But is following Denmark’s lead a fairy tale come true — or a nightmare in slow motion? Plus, we find out what this new schedule could mean for kids’ vaccines in the U.S. We hear from Professor Jens Lundgren and pediatrician and researcher David Higgins. Find our transcript here: https://bit.ly/ScienceVsVaccineSchedules In this episode, we cover: (00:00) The growing turmoil around vaccines in the U.S. (02:20) Why did the CDC change its vaccine recommendations? (07:29) Vaccines, the Danish way (16:20) Should the U.S. copy Denmark’s vaccine schedule? (20:22) How bad is this? (22:03) RSV: A case study in confusion (28:27) What should parents do now? This episode was produced by Blythe Terrell and Meryl Horn with help from Rose Rimler, Michelle Dang and Ekedi Fausther-Keeys. We’re edited by Blythe…

AI tools like ChatGPT have taken the world by storm, with tons of people saying they use them regularly. This is especially true for students, many of whom say they use AI to get their schoolwork done. And this is freaking some of us out — we're hearing that jumping on the AI train could be a terrible idea, partly because of claims that these tools could be bad for our brains. So — are we outsourcing too much of our thinking to the bots?? Will our brains turn to mush? Or can we use AI to boost our brainpower? To find out, we talk to Dr. Shiri Melumad, expert in the psychology of technology, and Dr. Aaron French, expert in information systems. Find our transcript here: https://bit.ly/ScienceVsAIStupid In this episode, we cover: (00:00) Is AI ruining or boosting our brains? (02:45) How often are LLMs like ChatGPT wrong? (05:01) Do LLMs mess with our ability to learn? (19:26) Does using AI make us more productive? (24:33) Another example of a technology that freaked a bunch of people out (27:40) Can using AI…

Influencers are out in full force, telling us how we can “manifest” anything we want using only the power of our thoughts. Want that dream car, dream boyfriend, or dream house? Act as if you already have it, and the universe will respond. And we know our thoughts can be powerful … so, could this be legit? We go on the hunt for a manifestation method that has the science stamp of approval. We talk to psychologists Prof. Laura King and Prof. Gabriele Oettingen. Find our transcript here: https://bit.ly/ScienceVsManifestation Chapters: (00:00) The Promise of Manifesting (04:54) The Best Possible Self Exercise (09:40) Wendy and Rose Give it a Go (12:23) The Fantasy Fiasco (17:19) How To Get Your Dream Life (science approved!) (20:44) Just a Bit of Magic Check out Gabriele’s science-backed manifesting method here: https://woopmylife.org/en/science This episode was produced by Rose Rimler, with help from Wendy Zukerman, Ekedi Fausther-Keeys, Michelle Dang, and Meryl Horn. We’re edited by Blythe Terrell. Fact…

Tons of people visit the chiropractor, saying it helps soothe pain in their neck or back. But we’re now hearing claims that chiro can do a whole lot more. Like, some say it can help kids with stuff like asthma, colic, even breastfeeding problems. So … can chiro really do all that?? To find out what’s cracking here, we talk to chiropractor Carl Cleveland III, physical therapist Anita Gross, neurophysiologist Dr. Marcello Costa — and the parents of former Senior Producer Kaitlyn Sawrey. We originally published a version of this episode several years ago; we’ve updated it with new science. Check out our full transcript here: https://bit.ly/sciencevschiropractors 00:00 Welcome to Science Vs chiropractors 01:09 Baby Kaity and the Sawreys 04:54 The origin of chiropractic 07:35 The theory behind subluxation 10:19 Neck and back pain 13:18 The science on taking kids to the chiro 19:07 The evidence on subluxation 24:42 What are the risks? 27:14 Let’s round it all up This episode was produced by Rose Rimler and Wendy…

Today, we’re celebrating 10 years of Science Vs with … science! We’ll tell you all about the so-called orgasm gap, the incorrect idea that vaccines are linked to autism, and the incorrect idea that ivermectin helps with Covid-19. We’ll also cover the Paleo Diet — this was the first EVER episode of Science Vs. And you’ll hear one of the greatest moments in Science Vs history. THANK YOU for listening! Find our transcript here: https://bit.ly/ScienceVs10 (00:00) We’re celebrating 10 years of Science Vs! (04:10) Our peer-reviewed paper on the “orgasm gap” (10:13) Vaccines don’t cause autism (14:20) Ivermectin doesn’t help with Covid (20:54) Should you go on the paleo diet? (34:01) One of the greatest Science Vs moments of all time This episode was produced by Blythe Terrell, with help from Wendy Zukerman, Meryl Horn, Michelle Dang, Rose Rimler, and Ekedi Fausther-Keeys. Hannah Harris Green was the lead producer on our Orgasm Gap episode. Heather Rogers was our lead producer on the Vaccines episode. We’re edited…

Every day we’re all doing a little bit of chemistry: when we bake potatoes, add a little salt to our pasta, or even bake a box cake. And award-winning chef Samin Nosrat just loves to nerd out over all this. She's the author of the best-selling book “Salt, Fat, Acid, Heat” and has a new book out called “Good Things.” Today, Samin joins us to talk all about the science and art of cooking. Plus — why you should NEVER put meatballs on spaghetti. Video available on Spotify. Find our transcript here: https://bit.ly/ScienceVsSaminNosrat Samin’s Book: https://ciaosamin.com/shop/good-things In this episode, we cover: (00:00) Welcome to Science Chats with Samin Nosrat (01:27) Samin’s childhood in California (06:05) Samin’s obsession with boxed cake mix (14:29) Why salt, fat, acid and heat matter (17:17) The magic of salt (21:11) Why soy sauce and cheese can bring out big feelings (32:26) Why we bake with room-temperature eggs (34:32) Why tomatoes don’t belong in the fridge (37:00) The geopolitics of cinnamon (40:07)…

The internet is abuzz with accusations that artificial intelligence is using up tons of energy and water. People are even protesting the building of new AI data centers, saying they’ll put a huge strain on local resources. But some AI defenders say that this fear is overblown and that AI isn’t actually that bad for the environment. So who’s right? We talk to science and tech reporters Casey Crownhart and James O’Donnell, and computer scientist Prof. Shaolei Ren. UPDATE, 11/13/25: This episode has been updated to note that some AI companies advertise on the show. Find our transcript here: https://tinyurl.com/ScienceVsAIEnvironment Read James and Casey's article here: https://www.technologyreview.com/2025/05/20/1116327/ai-energy-usage-climate-footprint-big-tech/ Check out the Mythbusters GPU/CPU demonstration here: https://www.youtube.com/watch?v=WmW6SD-EHVY In this episode, we cover: (0:00) Chapter One: No More AI For Dank Memes?! (3:34) Chapter Two: How Much Energy Does Your AI Query Use? (15:37) Chapter…

We’ve been told that foods like butter and bacon are bad for us — because they're packed with saturated fats. And top dogs in nutrition say that a better option is vegetable oil, like canola oil. But lots of people, including HHS Secretary Robert F. Kennedy Jr., are saying hold on. They're arguing that saturated fats are actually the way to go. And they're claiming that those vegetable oils, aka “seed oils,” are incredibly dangerous. So — who’s right?? To find out, we speak to author and physician Dr Cate Shanahan, professor of nutrition science Jason Wu, professor of endocrinology David Schade, and Dr David Iggman. [REBROADCAST] Find our transcript here: https://bit.ly/SVSeedOils In this episode, we cover: (00:00) Seed oils are the devil (05:35) Is saturated fat killing you? (12:25) Does cholesterol cause heart attacks? (22:02) Do seed oils cause inflammation? (28:00) Are seed oils killing you? This episode was produced by Wendy Zukerman, with help from Joel Werner, Rose Rimler, Nick DelRose and Michelle…

Daylight saving time is ending, and the darkness is coming for us all. And many of us dread this time of year; we think that switching up our clocks sucks. But beyond that, we hear that all this clock changing can be bad for our health, contributing to stuff like heart attacks. So, should we ditch these annoying switches altogether? And if we do that, which way should we go: daylight saving time all year, or standard time?? We look at the science and talk to wildlife ecologist Prof. Laura Prugh and sleep scientist Prof. Jamie Zeitzer. Find our transcript here: https://bit.ly/ScienceVsDaylightSavingTime In this episode, we cover: (02:15) Why do we have daylight saving time? (05:25) What happens when we “fall back” (14:15) Is daylight saving time bad for our health? (27:00) What should we do? This episode was produced by Michelle Dang, with help from Rose Rimler, Meryl Horn, Ekedi Fausther-Keeys, and Wendy Zukerman. We’re edited by Blythe Terrell. Our executive producer is Wendy Zukerman. Mix and sound design…

With “No Nut November” right around the corner, it's time to ask: What are the benefits of saving your seed and not ejaculating? People say that it'll boost your testosterone, giving you better libido — and even making your skin glow. Some say you'll feel like a beast, your energy is gonna be insane and it'll even improve the quality of your sperm. Is all this true?? And are there any risks when it comes to leaving your nut unbusted? We speak to urologist and andrologist Dr. Justin Dubin and reproductive endocrinologist and fertility specialist Dr. Brent Hanson, alongside special guest comedian Suren Jayemanne. Find our transcript here: https://bit.ly/ScienceVsSemenRetention In this episode, we cover: (00:00) The idea behind saving your seed (07:43) The idea of semen retention is huge online (09:52) Can semen retention bump up your testosterone? (15:45) Can semen retention improve mood and athletic performance? (23:22) Can semen retention improve your sperm quality? This episode was produced by Wendy…

Birth rates are falling all over the world, and some people are freaking out, saying this could tank our society — and even spell the end of humans. In the U.S., so-called pronatalism is having a major moment, with lots of people making the case for more babies — President Trump has called for a “baby boom” and has pledged to be “the fertilization president.” So today, we’re going to find out: Is humanity really hurtling toward population disaster? And if this IS a problem — is it even possible to flip the switch from baby bust to baby boom? To find out, we speak with economists Prof. Jisoo Hwang and economics lecturer Dr. Neha Deopa. Find our transcript here: https://bit.ly/ScienceVsFertilityRates In this episode, we cover: (00:00) People are freaking out about the birth rate (02:51) Are fertility rates really declining? (07:42) Why South Korea’s fertility rate is so low (14:51) How low fertility rates can mess up society (20:24) Can influencers bump up fertility rates?? (28:17) Which government policies…

Sugar is getting tons of hate these days, from TikTok influencers telling us to cut added sugar out of our diets to RFK Jr. declaring that sugar is “poison.” But is sugar really that bad? And are certain kinds worse — or better — than others? We’ll find out by diving into the wild world of cane sugar, high-fructose corn syrup, honey and maple syrup. We talk to nutritionist Professor Jim Mann and research nutritional biologist Dr. Kimber Stanhope. Find our transcript here: https://bit.ly/ScienceVsSugar In this episode, we cover: (00:00) Sugar: The villain in our diets (02:22) The good side of sugar (04:51) How sugar is bad for us (12:19) Is high fructose corn syrup that bad? (23:44) Agave Syrup, Maple Syrup, and Honey (30:15) How much sugar is too much? This episode was produced by Meryl Horn, with help from Rose Rimler, Michelle Dang, and Ekedi Fausther-Keeys. We’re edited by Blythe Terrell. Mix and sound design by Bobby Lord. Our executive producer is Wendy Zukerman. Fact checking by Sam Lemonick. Music…

People swear that weird stuff goes down on a full moon. In fact, even SERIOUS folks like the nerds who work in ERs will tell you that something is off about those nights. And what’s amazing is that science has actually looked at this. And … there is some weird stuff here! From animals to ERs to our circadian rhythms to our menstrual cycles, we’ll find out — is something afoot during a full moon? We talk to Emeritus Prof. of emergency medicine Dr. Wendy Coates and circadian rhythm researchers Prof. Horacio de la Iglesia, Prof. Kristin Teßmar-Raible, and Prof. Charlotte Helfrich-Förster. Find our transcript here: https://bit.ly/ScienceVsFullMoon In this episode, we cover: (00:00) What do people think the full moon is doing to us? (03:54) How the moon influences animals (07:47) Does the full moon make ERs busier? (15:09) Does the full moon affect our sleep? (22:11) HOW is the full moon messing with us? (31:05) Does the full moon affect our menstrual cycles? This episode was produced by Meryl Horn, with help…

Ever wonder why your dog just loves to sniff your junk? Well, it turns out it’s because other animals perceive the world in wild ways that we’re just beginning to understand. So today, we’re immersing ourselves in their world, talking about the cutting-edge science of how animals perceive with Pulitzer Prize-winning science writer Ed Yong. He’s spinning yarns from his latest book: “An Immense World: How Animal Senses Reveal the Hidden Realms Around Us.” After this journey, you'll look at your dog in a totally different light, you'll appreciate how eyes have literally painted the world — and you might even feel sorry for the humble cockroach. Video available on Spotify. Find our transcript here: https://bit.ly/ScienceVs_EdYong In this episode, we cover: (00:00) Ed Yong’s amazing book on animal perception (03:58) Magnificent sniffers (11:20) Every possible degree of eye (18:15) Hearing in different ways (25:11) Touch and vibrations (33:05) Science under threat in the U.S. (41:10) Oddball questions This episode…

RFK Jr.’s big report on autism is scheduled to come out this month, and we’re hearing that it might point the finger at Tylenol as a possible cause. And the science on this gets confusing fast. Because some studies do suggest that taking acetaminophen while you’re pregnant could increase your kid’s chance of being autistic or having ADHD. But other research doesn’t find a clear connection — and scientists think there could be a whole other explanation here. So, what’s going on?? We sort it out, with help from epidemiologist Prof. Brian Lee. Find our transcript here: https://bit.ly/ScienceVsTylenolAutism In this episode, we cover: (00:00) The fears around acetaminophen and autism (02:18) Could acetaminophen be an endocrine disruptor? (06:25) Could acetaminophen affect brain development? (10:44) What if something else is going on? (20:26) Is there a link between acetaminophen and autism — or not?? This episode was produced by Meryl Horn, with help from Rose Rimler, Michelle Dang, and Ekedi Fausther-Keeys.…

Many of us use artificial intelligence for help with research, work, or creative projects. But some people are getting a LOT more personal with their AI chatbots. We’re hearing stories of people treating their chatbot like a friend, or something more than a friend — with some people saying they’ve even fallen in love with their chatbot. And then there are stories of things taking a scary turn, with people’s mental health spiraling out of control after talking to these bots. So, what should we make of AI companions? Is it risky to spend a lot of time talking to an AI bot? We ask AI researcher Dr. Julian de Freitas and psychiatrist Dr. Keith Sakata. This episode does mention mental health issues and suicide. Here are some crisis hotlines: United States: US National Suicide Prevention Lifeline Dial 988 (Online chat available); US Crisis Text Line Text “HOME” to 741741 Australia: Lifeline 13 11 14 (Online chat available) Canada: Canadian Association for Suicide Prevention (See link for phone numbers listed by…