This week's episode

Arctic Dispatch
Jul 20, 2026

Arctic Dispatch
Ship-to-shore chats 

The Arctic serves as the world’s refrigerator, keeping the planet cool. But temperatures in the Arctic are rising nearly four times faster than the rest of the world and its sea ice is near a historic low. We put out a call to scientists aboard research vessels currently sailing in the Arctic Ocean, and two answered “aye.” Hear our ship-to-shore conversations with them about how warmer temperatures affect life on land and sea. Plus, a biologist who recently returned from the field describes how he inadvertently stumbled upon surprising data during his decades-long study of polar bears. 

Guests:

Autun Purser – Marine biologist at the Alfred- Wegener Institute and the current Chief Scientist on the Arctic research vessel, the Polarstern 

Andrew Derocher – Zoologist at the University of Alberta in Canada who is leading a decades-long study on polar bears of the West Hudson Bay region, in the high Canadian North   

Jonathan Nash – Oceanographer, Oregon State University, and member of the GIANT team sailing near Greenland aboard the RRS Sir David Attenborough 

Photo: Nadine Knüppel

Descripción en español

Big Picture Science is part of the Airwave Media podcast network. Please contact advertising@airwavemedia.com to inquire about advertising on Big Picture Science.

You can get early access to ad-free versions of every episode by joining us on Patreon. Thanks for your support!

Cold Comfort
Jul 13, 2026
Cold Comfort
Should we chill on using AC?

Download audio

Another scorching summer has us blasting the AC and grabbing a chilled drink. Air conditioning and refrigeration may beat the heat, but they also present a dilemma. The more we use them, the more greenhouse gases we emit, the hotter the planet becomes, and the more we require artificial cooling.  Can we escape this feedback loop?  We look at the origins of these chilling technologies, tour the extensive chain of cold that keeps food from perishing, and consider how a desert city like Phoenix could not exist without AC.

Guests:

Nicola Twilley – co-host of the Gastropod podcast, a contributing writer at The New Yorker, and the author of  “Frostbite: How Refrigeration Changed Our Food, Our Planet, and Ourselves

Erik Morrison – Chief cooling engineer at Transaera, Somerville, Massachusetts

Stan Cox – Lead scientist at the Land Institute, author of “Losing Our Cool: The Uncomfortable Truths about our Air-Conditioned World

Descripción en español

Originally posted September 16, 2024

Featuring music by Dewey Dellay and Jun Miyake

Big Picture Science is part of the Airwave Media podcast network. Please contact advertising@airwavemedia.com to inquire about advertising on Big Picture Science.

You can get early access to ad-free versions of every episode by joining us on Patreon. Thanks for your support!

CRISPR Mosquitoes
Jul 06, 2026
CRISPR Mosquitoes
Are we on a slippery slope?

Download audio

The powerful gene editing tool CRISPR is already being tested on animal and plant cells. It has even been used on humans. How might this revolutionary tool change our lives? On the one hand, it could cure inherited diseases and rid the world of malaria-spreading mosquitoes. On the other hand, scientists using it are accelerating evolution and introducing novel genetic combinations that could transform our biological landscape in unforeseen ways. We explore the ramifications of this revolutionary technology.

Guests:

Nathan Rose – Molecular biologist and head of malaria programs at U.K. based biotech company, Oxitec.

Hank Greely – Law professor and director of the Center for Law in the Biosciences at Stanford University and author of “CRISPR People: The Science and Ethics of Editing Humans.”

Antonio Regalado – Senior Editor for Biomedicine, MIT Technology Review.

Descripción en español

originally aired April 17, 2023

Featuring music by Dewey Dellay and Jun Miyake

Big Picture Science is part of the Airwave Media podcast network. Please contact advertising@airwavemedia.com to inquire about advertising on Big Picture Science.

You can get early access to ad-free versions of every episode by joining us on Patreon. Thanks for your support!

 

Skeptic Check: Blue Light Special
Jun 29, 2026
Skeptic Check: Blue Light Special
What’s causing our insomnia?

Download audio

Many of us know the feeling: we intend to go to bed but pull out our phones for one last scroll. Setting them aside hours later, we’re wide awake, unable to fall asleep. For years, scientists have singled out blue light emitted from our devices as the key culprit behind our post-scrolling insomnia, but the scientific consensus is shifting. Although blue light signals to brains that its daytime, surprising new research suggests that our glowing screens may play a smaller role than previously thought.

We present the fascinating science around biological mechanisms of sleep and wakefulness, why circadian rhythms have more in common with your grandfather’s clock than you might think, and why scientists who question the role of blue light in causing nighttime restlessness, still don’t let our phones off the hook completely.

Guests:

Michael Gradisar – clinical psychologist and sleep researcher, former professor at Flinders University in Australia. Currently serves a head of Sleep Science at Sleep Cycle, a sleep tracking app company

Jay Dunlap – geneticist and molecular geneticist at the Geisel School of Medicine at Dartmouth who works the molecular basis of circadian rhythms

Mariana Figueiro – photobiologist, Director of the Light and Health Research Center and Professor of Population Health Science and Policy at the Icahn School of Medicine at Mount Sinai

Descripción en español

Big Picture Science is part of the Airwave Media podcast network. Please contact advertising@airwavemedia.com to inquire about advertising on Big Picture Science.

You can get early access to ad-free versions of every episode by joining us on Patreon. Thanks for your support!

Make Space for Animals
Jun 22, 2026
Make Space for Animals
Human exceptionalism

Download audio

Long before Yuri Gagarin became the first human to go into space, Laika, a stray dog, crossed the final frontier. Find out what other surprising species were drafted into the astronaut corps.

They may be our best friends, but we still balk at giving other creatures moral standing. And why are humans so reluctant to accept the fact that we too are animals?

Guests:

Jo Wimpenny - Zoologist and writer. Author of “Aesop’s Animals

Taylor Maggiacomo - Associate Graphic Editor at National Geographic

Alexander Stegmaier - Freelance Graphic Editor at National Geographic

Melanie Challenger - An author who writes on nature, environment and human history. Her latest book: “How to be Animal: A New History of What it Means to be Human

Descripción en español

If you have a subscription to National Geographic, check out Taylor and Alex's feature providing a visual timeline of every animal that has gone into space.

Featuring music by Dewey Dellay and Jun Miyake

originally aired January 24, 2022

Big Picture Science is part of the Airwave Media podcast network. Please contact advertising@airwavemedia.com to inquire about advertising on Big Picture Science.

You can get early access to ad-free versions of every episode by joining us on Patreon. Thanks for your support!