It’s fairly strange that humans, unlike many other mammals, don’t have hair all over. Our lack of body hair and wide geographic distribution led to the variation of sun-protective melanin in our skin. For the hair that remains, why did some groups develop curls while others did not? Biological anthropologist Tina Lasisi takes host Rachel Feltman through her work on understanding the roots of hair types. Plus, they discuss what we might learn from “chemo curls” and how developmental shifts change the extent and texture of hair during puberty.

Recommended reading:

Read more about Tina Lasisi at her website

Read papers on hair and thermoregulation published by Lasisi and her colleagues in 2024 and 2023

E-mail us at [email protected] if you have any questions, comments or ideas for stories we should cover!

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Science Quickly is produced by Rachel Feltman, Fonda Mwangi, Kelso Harper, Madison Goldberg, Naeem Amarsy and Jeff DelViscio. This episode was hosted by Rachel Feltman. Our show is edited by Jeff DelViscio with fact-checking by Shayna Posses and Aaron Shattuck. The theme music was composed by Dominic Smith.

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Scientists now agree that COVID spreads via airborne transmission. But during the early days of the disease, public health officials suggested that it mainly did so via close contact. The subsequent back-and-forth over how COVID spread brought science journalist Carl Zimmer into the world of aerobiology. In his new book Air-Borne: The Hidden History of the Life We Breathe, Zimmer examines the unseen life in the air around us. He joins host Rachel Feltman to look back at the history of the field, from ancient Greek “miasmas” to Louis Pasteur’s unorthodox experiments to biological warfare. 

You can preorder Zimmer’s new book

And stay up-to-date on his work at his website

E-mail us at [email protected] if you have any questions, comments or ideas for stories we should cover!

Discover something new every day: subscribe to Scientific American and sign up for Today in Science, our daily newsletter. 

Science Quickly is produced by Rachel Feltman, Fonda Mwangi, Kelso Harper, Madison Goldberg, Naeem Amarsy and Jeff DelViscio. This episode was hosted by Rachel Feltman. Our show is edited by Naeem Amarsy with fact-checking by Shayna Posses and Aaron Shattuck. The theme music was composed by Dominic Smith.

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Love isn’t just about romance. This Valentine’s Day, we’re exploring the power of deep nonromantic bonds. Host Rachel Feltman sits down with Rhaina Cohen, a producer and editor for NPR’s podcast Embedded and author of The Other Significant Others, to discuss the history and psychology of friendship—and the reasons these connections deserve just as much celebration as romantic partnerships.

Recommended reading:

—The Evolutionary Origins of Friendship

—How to Reconnect with Old Friends Who Have Become Strangers

Subscribe to Rhaina Cohen’s newsletter.

E-mail us at [email protected] if you have any questions, comments or ideas for stories we should cover!

Discover something new every day: subscribe to Scientific American and sign up for Today in Science, our daily newsletter.

Science Quickly is produced by Rachel Feltman, Fonda Mwangi, Kelso Harper, Madison Goldberg, Naeem Amarsy and Jeff DelViscio. This episode was hosted by Rachel Feltman. Our show is edited by Madison Goldberg with fact-checking by Shayna Posses and Aaron Shattuck. The theme music was composed by Dominic Smith.

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The European Space Agency recently announced that the near-Earth asteroid 2024 YR4 has a 2 percent chance of hitting our planet in 2032. The probability of impact is difficult to predict exactly and will be clearer in 2028, when 2024 YR4 will whiz by us. But if the asteroid really is on a collision course with Earth, what can we do about it? Senior space and physics editor Lee Billings joins host Rachel Feltman to unpack this headline-making story.

Recommended reading:

Newfound Asteroid May Hit Earth in 2032, Scientists Say 

E-mail us at [email protected] if you have any questions, comments or ideas for stories we should cover!

Discover something new every day: subscribe to Scientific American and sign up for Today in Science, our daily newsletter. 

Science Quickly is produced by Rachel Feltman, Fonda Mwangi, Kelso Harper, Madison Goldberg, Naeem Amarsy and Jeff DelViscio. This episode was hosted by Rachel Feltman with guest Lee Billings. Our show is edited by Jeff DelViscio with fact-checking by Shayna Posses and Aaron Shattuck. The theme music was composed by Dominic Smith.

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A subtype of H5N1 bird flu that has been found in cattle for the first time suggests that the virus jumped from birds to the animals twice. A headline-making study estimates that we have a spoon’s worth of microplastics in our brain. Streams of rock from a cosmic impact created the moon’s two deep canyons, Vallis Schrödinger and Vallis Planck. A large study shows that people feel their best in the morning and their worst at midnight. Bonobos can tell when humans don’t know something—and try to help us.

Recommended reading:

The U.S. Is Not Ready for Bird Flu in Humans 

Bonobos Can Tell When a Human Doesn’t Know Something 

Is Snoozing the Alarm Good or Bad for Your Health?  

E-mail us at [email protected] if you have any questions, comments or ideas for stories we should cover!

Discover something new every day: subscribe to Scientific American and sign up for Today in Science, our daily newsletter.

Science Quickly is produced by Rachel Feltman, Fonda Mwangi, Kelso Harper, Madison Goldberg, Naeem Amarsy and Jeff DelViscio. This episode was hosted by Rachel Feltman. Our show is edited by Naeem Amarsy with fact-checking by Shayna Posses and Aaron Shattuck. The theme music was composed by Dominic Smith.

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The first few weeks of the Trump administration have been marked by chaos and confusion for the nation’s health and science agencies. A funding freeze broadly targeting language around diversity, equity and inclusion has agencies evaluating research and initiatives. A hold on public communications from health agencies is affecting public health reporting to people in the U.S.—and to the World Health Organization. Entire websites have gone dark as agencies have tried to comply, though archivists are preventing critical datasets from disappearing. Max Kozlov, a Nature reporter who covers biomedical science, joins host Rachel Feltman to walk through what the next four years might hold for research and researchers in the U.S. Overall, the orders have caused uncertainty for scientists in the nation, and associate health editor Lauren Young discusses the frustration and fear she’s hearing from them.

Read more of Max Kozlov’s reporting:

–Trump Abruptly Cancels Crucial Science Reviews at NIH, World’s Largest Public Funder of Biomedical Research 

–Exclusive: How NSF Is Scouring Research Grants for Violations of Trump’s Orders

–Chaos Erupts in US Science as Trump’s Team Declares Freeze on Federal Grants

E-mail us at [email protected] if you have any questions, comments or ideas for stories we should cover!

Discover something new every day: subscribe to Scientific American and sign up for Today in Science, our daily newsletter.

Science Quickly is produced by Rachel Feltman, Fonda Mwangi, Kelso Harper, Madison Goldberg and Jeff DelViscio. This episode was hosted by Rachel Feltman with guest Lauren Young. Our show is edited by Madison Goldberg with fact-checking by Shayna Posses and Aaron Shattuck. The theme music was composed by Dominic Smith.

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It’s almost impossible not to feel outraged these days. But overexposure to information that makes us angry can wear us down. Senior health and medicine editor Tanya Lewis joins host Rachel Feltman to discuss how to combat outrage fatigue. Plus, we discuss a surprising finding about outrage and the spread of misinformation.

Recommended reading:

–Read Tanya Lewis’s full story on outrage fatigue

–Listen for tips on converting cynicism into hopeful skepticism 

E-mail us at [email protected] if you have any questions, comments or ideas for stories we should cover!

Discover something new every day: subscribe to Scientific American and sign up for Today in Science, our daily newsletter.

Science Quickly is produced by Rachel Feltman, Fonda Mwangi, Kelso Harper, Madison Goldberg and Jeff DelViscio. This episode was hosted by Rachel Feltman with guest Tanya Lewis. Our show is edited by Madison Goldberg with fact-checking by Shayna Posses and Aaron Shattuck. The theme music was composed by Dominic Smith.

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This week we’re recapping Robert F. Kennedy, Jr.’s confirmation hearings. Highly pathogenic H5N9, a strain of bird flu, was found in U.S. poultry. A tuberculosis outbreak in Kansas is making headlines—but how severe is the spread? Health equity reporter Bek Shackelford-Nwanganga of the Kansas News Service and KCUR joins host Rachel Feltman to unpack the situation. Plus, we discuss fossilized puke and ice-resistant polar bear hair.

Recommended reading:

–Shackelford-Nwanganga’s reporting on the tuberculosis outbreak in Kansas

–The Latest on Bird Flu in Humans, Cats and Chickens

–RFK, Jr., Confirmation Hearing Showed 5 Ways He Threatens Public Health 

E-mail us at [email protected] if you have any questions, comments or ideas for stories we should cover!

Discover something new every day: subscribe to Scientific American and sign up for Today in Science, our daily newsletter. 

Science Quickly is produced by Rachel Feltman, Fonda Mwangi, Kelso Harper, Madison Goldberg and Jeff DelViscio. This episode was hosted by Rachel Feltman. Our show is edited by Madison Goldberg with fact-checking by Shayna Posses and Aaron Shattuck. The theme music was composed by Dominic Smith.

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It’s easy to be cynical about the state of the world—even when you’re a researcher who studies empathy and kindness. Stanford University psychologist Jamil Zaki turned his own negativity into his new book Hope for Cynics: The Surprising Science of Human Goodness. The book busts common myths about cynicism and explores what it could be doing to our body and brain. Zaki reflects on the imperfections of cynicism and hope and presents a third option: hopeful skepticism.

Recommended reading:

Read Hope for Cynics: The Surprising Science of Human Goodness. 

Follow Jamil Zaki’s work at www.jamil-zaki.com and www.ssnl.stanford.edu

E-mail us at [email protected] if you have any questions, comments or ideas for stories we should cover!

Discover something new every day: subscribe to Scientific American and sign up for Today in Science, our daily newsletter. 

Science Quickly is produced by Rachel Feltman, Fonda Mwangi, Kelso Harper, Madison Goldberg and Jeff DelViscio. This episode was hosted by Rachel Feltman. Our show is edited by Fonda Mwangi with fact-checking by Shayna Posses and Aaron Shattuck. The theme music was composed by Dominic Smith.

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The sun is in the middle of its solar maximum, the part of its 11-year solar cycle that was responsible for the stunning auroras seen across the globe last year. This year is looking equally exciting, with more incoming space weather and a handful of science missions to study the sun’s wide-reaching behavior. Senior reporter Meghan Bartels reviews the missions that are launching in 2025 and explains the reasons why you should be excited by heliophysics.

Recommended reading:

Heliophysics Is Set to Shine in 2025 

Should You Really Worry about Solar Flares? 

E-mail us at [email protected] if you have any questions, comments or ideas for stories we should cover!

Discover something new every day: subscribe to Scientific American and sign up for Today in Science, our daily newsletter. 

Science Quickly is produced by Rachel Feltman, Fonda Mwangi, Kelso Harper, Madison Goldberg and Jeff DelViscio. This episode was hosted by Rachel Feltman with guest Meghan Bartels. Our show is edited by Jeff DelViscio with fact-checking by Shayna Posses and Aaron Shattuck. The theme music was composed by Dominic Smith.

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