Science Vs

Latest Episodes:

Daylight Saving Time: Should We End It? Oct 30, 2025

Show notes

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 by Bobby Lord. Fact checking by Erica Akiko Howard. Music written by Peter Leonard, Bobby Lord, So Wylie, Emma Munger and Bumi Hidaka. And a special thanks to researcher Dr. Aiste Steponenaite, who also spoke to me for this episode.

Science Vs is a Spotify Studios Original. Listen for free on Spotify or wherever you get your podcasts. Follow us and tap the bell for episode notifications.

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Semen Retention: Should You Stop Ejaculating? Oct 23, 2025

Show notes

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 Zukerman, with help from Michelle Dang, Meryl Horn, Rose Rimler, and Ekedi Fausther-Keeys. We’re edited by Blythe Terrell. Fact checking by Erica Akiko Howard. Mix and sound design by Bobby Lord. Music written by Emma Munger, So Wylie, Peter Leonard, Bumi Hidaka and Bobby Lord. A big thanks to Joseph Lavelle Wilson and the Zukerman family.

Science Vs is a Spotify Studios Original. Listen for free on Spotify or wherever you get your podcasts. Follow us and tap the bell for episode notifications.

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Birth Rates: Are We Running Out of Babies?? Oct 16, 2025

Show notes

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 could bump up fertility rates?

(35:43) What SHOULD we do if we want people to have more babies?

This episode was produced by Blythe Terrell, with help from Rose Rimler, Meryl Horn, Michelle Dang, and Ekedi Fausther-Keeys. We’re edited by Blythe Terrell. Our executive producer is Wendy Zukerman. Mix and sound design by Bobby Lord. Fact checking by Diane Kelly. Research help from Erica Akiko Howard. Music written by Peter Leonard, Bobby Lord, So Wylie, Emma Munger and Bumi Hidaka. A very special thanks to all the researchers who spoke to me for this episode, including Professor Rannveig Kaldager Hart, Dr. Janna Bergsvik, Professor Amy Tsui, Dr. Gretchen Donehower, Dr. Emily Klancher Merchant and Professor Landon Schnabel.

Science Vs is a Spotify Studios Original. Listen for free on Spotify or wherever you get your podcasts. Follow us and tap the bell for episode notifications.

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Sugar: How Bad Is It Really? Oct 09, 2025

Show notes

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 written by Peter Leonard, Bobby Lord, So Wylie, Emma Munger and Bumi Hidaka. Thanks to all the researchers we spoke to including Professor Barry Popkin, Dr. John White, Dr. Nick Fuller, Professor Paul Breslin, Dr. Richard Johnson, and Dr. Vasanti Malik.

Science Vs is a Spotify Studios Original. Listen for free on Spotify or wherever you get your podcasts. Follow us and tap the bell for episode notifications.

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The Full Moon: Is It Messing With Us? Oct 02, 2025

Show notes

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 from Wendy Zukerman, Rose Rimler, Michelle Dang, and Ekedi Fausther-Keeys. We’re edited by Blythe Terrell. Mix and sound design by Bumi Hidaka. Fact checking by Marlowe Starling. Music written by Bumi Hidaka, Bobby Lord, Emma Munger, So Wylie, and Peter Leonard. Thanks to all the researchers we spoke to for this episode, including Dr. Ron Flick, Dr. Michael Smolensky, Michael Bevington, Dr. Laurel Symes, Professor Laura Prugh, and Dr. Maarten Nijsten. Special thanks to Kevin Walsh and all the folks who chatted with me about the full moon.

Science Vs is a Spotify Studios Original. Listen for free on Spotify or wherever you get your podcasts. Follow us and tap the bell for episode notifications.

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How to Smell like a Dog, with Ed Yong Sep 25, 2025

Show notes

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 was produced by Wendy Zukerman, with help from Michelle Dang, Meryl Horn, Ekedi Fausther-Keeys, 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 Hidaka and Bobby Lord. Thanks to Skyline Studios and Stupid Old Studios.

Science Vs is a Spotify Studios Original. Listen for free on Spotify or wherever you get your podcasts. Follow us and tap the bell for episode notifications.

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Does Tylenol Cause Autism? Sep 18, 2025

Show notes

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. We’re edited by Blythe Terrell. Mix and sound design by Bumi Hidaka. Our executive producer is Wendy Zukerman. Fact checking and consulting by Erica Akiko Howard. Music written by Peter Leonard, Bobby Lord, So Wiley, Emma Munger and Bumi Hidaka. Thanks to the researchers we spoke to for this episode and our other episode on autism.

Science Vs is a Spotify Studios Original. Listen for free on Spotify or wherever you get your podcasts. Follow us and tap the bell for episode notifications.

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AI Chatbots: Are They Dangerous? Sep 11, 2025

Show notes

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 province)

United Kingdom: Samaritans 116 123 (UK and ROI)

Full list of international hotlines here

Find our transcript here: https://bit.ly/ScienceVsAiCompanions

Chapters:

In this episode, we cover:

(00:00) What’s it like to fall in love with a chatbot?

(06:59) Do chatbots help people feel less lonely?

(21:19) Chatbots during a crisis

(28:43) Red flags to watch out for

(33:17) How dangerous are they?

This episode was produced by Rose Rimler, with help from Blythe Terrell, 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 Emma Munger, So Wylie, Peter Leonard, Bumi Hidaka and Bobby Lord. Thanks to all the researchers we reached out to, including Cathy Fang, Dr. Linnea Laestadius, Dr. Sophia Choukas Bradley, and Prof. Stefano Puntoni. Special thanks also to Jeevika Verma.

Science Vs is a Spotify Studios Original. Listen for free on Spotify or wherever you get your podcasts. Follow us and tap the bell for new episode notifications.

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Memory: How to Boost It Sep 04, 2025

Show notes

Lots of us feel like our memories are garbage — like we’d forget our pants if they weren’t on our legs. But what if the science told us that forgetting stuff is totally normal? We dig into the weird science of why our memories work the way they do. And if we DO want better retention in our brain box, are there science-approved ways to boost our memories? We talk to cognitive neuroscientist Prof. Charan Ranganath, neuroscientist Prof. Loren Frank, and psychologist Prof. Jan Born.

Find our transcript here: https://bit.ly/ScienceVsMemory

Check out Charan Ranganath’s book, Why We Remember: Unlocking Memory’s Power to Hold On To What Matters: https://charanranganath.com/book/

In this episode, we cover:

(00:00) Our crappy memories

(03:50) Forgetting is the default

(08:49) Event boundaries and how to get around them

(13:30) To remember more, up the stakes

(18:33) Can supplements or crosswords boost our memory?

(24:00) How sleep can enhance our memory

(28:48) “Downtime” as a memory hack

This episode was produced by Meryl Horn, with help from Wendy Zukerman, Rose Rimler, Michelle Dang, and Ekedi Fausther-Keeys. We’re edited by Blythe Terrell. Mix and sound design by Bumi Hidaka. Fact checking by Sam Lemonick. Music written by Bumi Hidaka, Bobby Lord, and Emma Munger. Thanks to all the researchers we spoke to for this episode, including Professor Bruce Miller, Dr. Christopher Madan, Professor Joel Kramer, Professor Marc Roig, Professor Sarah Raskin, and Professor Steven DeKosky.

Science Vs is a Spotify Studios Original. Listen for free on Spotify or wherever you get your podcasts. Follow us and tap the bell for episode notifications.

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We Are So Back Aug 28, 2025

Show notes

We’re back, baby. In a world where we’re being swarmed by misinformation and it feels like science is under threat, we’ve got you. Science Vs is kicking off with all new episodes full of actual scientific research done by actual scientists. We’re bringing you the science on sugar — is it really a poison? Should you switch to honey? We’ll look into AI “girlfriends” and ask: How problematic is it that people are spending their days with AI chatbots? Plus episodes on how to improve our memory, how worried we should be about forever chemicals, the science of the full moon, the idea of pronatalism and much MUCH more. New Science Vs eps will be in your feeds Sept. 4.

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