First up on the podcast, Online News Editor David Grimm joins host Sarah Crespi to talk about this year’s best online news stories—top performers and staff picks alike. Together they journey the scientific gamut, from bird feeders’ influence on hummingbird beak evolution to the use of “artificial spacetimes” to guide tiny robots through their environments.

Next on the show, a discussion of this year’s pick for Breakthrough of the Year with producer Meagan Cantwell and News editor Greg Miller. They also touch on some other top finds from this year, including the first confirmed Denisovan skull, rice that can beat the heat, custom gene editing, and progress on xenotransplantation.

This week’s episode was produced with help from Podigy.

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First up on the podcast, we’ve likely only found about half the so-called city-killer asteroids (objects more than 140 meters in diameter). Freelance science journalist Robin George Andrews joins host Sarah Crespi to discuss the upcoming launch of NASA’s Near-Earth Object Surveyor, an asteroid hunter that will improve our ability to look for large objects that might crash into Earth, particularly those hiding in the Sun’s glare.

Next on the show, freelancer producer Elah Feder talks with Wendy Valencia-Montoya, an organismic and evolutionary biology Ph.D. candidate at Harvard University, about heated conversations between plants and their pollinators. Her work suggests infrared radiation might be the oldest cue for animals to come hither, more ancient than color.

This week’s episode was produced with help from Podigy.

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First up on the podcast, Science celebrates 100 years of quantum mechanics with a special issue covering the past, present, and future of the field. News Contributing Correspondent Zack Savitsky joins host Sarah Crespi to talk about a more philosophical approach to quantum physics and the mysterious measurement problem.

Next on the show we have Anne Goujon, program director at the International Institute for Applied Systems Analysis in Laxenburg, Austria. She talks about her Expert Voices column on the uncertain future of demography and how the field is grappling with new theories on what happens after the global population peaks. How will different countries deal with falling populations? Will they try to reverse the trend? What are the goals going into the next century?

This week’s episode was produced with help from Podigy.

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First up on the podcast, when will the world hit peak carbon emissions? It’s not an easy question to answer because emissions cannot be directly measured in real time. Instead, there are proxies, satellite measures, and many, many calculations. Staff Writer Paul Voosen joins host Sarah Crespi to discuss how close we are to the top of carbon mountain and the tough road to come after the peak passes.

Vani Rajendran, senior researcher in the cognitive neuroscience department at the National Autonomous University of Mexico’s Institute of Cellular Physiology, talks about macaques that can keep the beat. She explains how this intriguing ability challenges a long-standing view that animals with complex vocalizations and rhythm are inextricably linked.

This week’s episode was produced with help from Podigy.

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First up on the podcast: the mysterious fate of Europe’s Neolithic farmers. They arrived from Anatolia around 5500 B.C.E. and began farming fertile land across Europe. Five hundred years later, their buildings, cemeteries, and pottery stopped showing up in the archaeological record, and mass graves with headless bodies started to appear across the continent. Contributing Correspondent Andrew Curry talks with host Sarah Crespi about what this strange transition might mean.

Next on the show, Editor for Life Sciences Sacha Vignieri discusses recent dog research published in Science, including tracing the movement of dogs alongside ancient human populations, examining when dogs first diversified, and probing the relationship between modern dogs’ breeds and their dispositions.

This week’s episode was produced with help from Podigy.

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First up on the podcast, Online News Editor David Grimm joins host Sarah Crespi for a rundown of online news stories. They talk about lichen that dine on dino bones, the physics of the lip-out problem in golf, and a brain-computer interface that can decode a tonal language (Chinese) from brain waves.

Next on the show, Jeremy Munday, a professor of electrical and computer engineering at University of California, Davis, talks about generating mechanical power using a heat engine aimed at the night sky. Heat engines typically generate power by harnessing a temperature difference between two things—but by using space as the cold part and the ground as the warm part, Munday’s device can generate energy at night.

This week’s episode was produced with help from Podigy.

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First up on the podcast, Contributing Correspondent Sofia Moutinho visited the Xingu Indigenous territory in Brazil to learn about a long-standing collaboration between scientists and the Kuikuro to better understand early Amazon communities.

Next on the show, we visit the Pacific pocket mouse recovery program at the San Diego Zoo Wildlife Alliance to talk with researchers about the tricky process of increasing genetic diversity in an endangered species. Researcher Aryn Wilder talks about a long-term project to interbreed mice from isolated populations in order to add more genetic diversity across the species—despite a mismatch in chromosome numbers between some of the groups. Debra Shier, associate director of the recovery ecology program at the San Diego Zoo Wildlife Alliance, takes us on a tour of the breeding facility.

This week’s episode was produced with help from Podigy.

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First up on the podcast, increased carbon dioxide emissions sink more acidity into the ocean, but checking pH all over the world, up and down the water column, is incredibly challenging. Staff Writer Paul Voosen joins host Sarah Crespi to discuss a technique that takes advantage of how sound moves through the water to detect ocean acidification.

Next on the show, we visit the lab of University of California San Diego professor Alysson Muotri at the Sanford Consortium, where he grows human brain organoids—multicellular structures that function like underdeveloped brains. Muotri used organoids to compare a protein that appears to be protective in human brains against the effects of lead toxicity with the archaic version of the protein that was present in our extinct cousins, like Denisovans and Neanderthals. His work suggests lead exposure differently affected our ancestors and our archaic cousins, possibly helping us survive to the present day.

Finally, stay tuned for the last in our six-part series on books exploring the science of death. This month, host Angela Saini talks with astrophysicist Katie Mack about how the universe might end and her 2021 book The End of Everything: (Astrophysically Speaking).

This week’s episode was produced with help from Podigy.

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First up on the podcast, the Bering Sea’s snow crabs are bouncing back after a 50-billion-crab die-off in 2020, but scientists are racing to predict what’s going to happen to this important fishery. Contributing Correspondent Warren Cornwall joins host Sarah Crespi to discuss what’s next for snow crabs.

Next on the show, freelance producer Elah Feder talks with Fei Peng, a professor in the department of psychology in the School of Public Health at Southern Medical University in Guangzhou, China, and principal investigator at the Great Bay Area Brain Science and Brain Inspired Research Center, about detecting emotions—or more scientifically “affect”—in bumble bees. His group observed how a bumble bee that appears to be hopeful can share this state with other bees.

This week’s episode was produced with help from Podigy.

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First up on the podcast, Contributing Correspondent Kai Kupferschmidt takes a trip to Svalbard, an Arctic archipelago where ancient RNA viruses may lie buried in the permafrost. He talks with host Sarah Crespi about why we only have 100 years of evolutionary history for viruses such as coronavirus and influenza, and what we can learn by looking deeper back in time.

Next on the show, Nathalie Stroeymeyt, senior lecturer at the School of Biological Sciences at the University of Bristol, joins freelancer producer Elah Feder to talk about how humans aren’t the only species that takes public health measures to stop outbreaks. To keep their colonies healthy when threatened with infectious disease, ants socially distance and even make architectural changes to their nests’ organization.

This week’s episode was produced with help from Podigy.

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