When did rats come to the Americas, and was Lucy really our direct ancestor?

When did rats come to the Americas, and was Lucy really our direct ancestor?

Tracing the arrival of rats using bones, isotopes, and a few shipwrecks; and what scientists have learned in 50 years about our famous ancestor Lucy First on the show: Did rats come over with Christopher Columbus? It turns out, European colonists weren’t alone on their ships when they came to the Americas—they also brought black and brown rats to uninfested shores. Eric Guiry, a researcher in the Trent Environmental Archaeology Lab at Trent University, joins host Sarah Crespi to discuss how tiny slices of bone from early colony sites and sunken shipwrecks can tell us when these pesky rodents arrived. Next, producer Meagan Cantwell talks with Contributing Correspondent Ann Gibbons about what has happened in the 50 years since anthropologists found Lucy—a likely human ancestor that lived 2.9 million to 3.3 million years ago. Although still likely part of our family tree, her place as a direct ancestor is in question. And over the years, her past has become less lonesome as it has become populated with other contemporaneous hominins. This week’s episode was produced with help from Podigy. About the Science Podcast Authors: Sarah Crespi; Meagan Cantwell; Ann Gibbons LINKS FOR MP3 META Episode page: https://www.science.org/doi/10.1126/science.z4scrgk About the Science Podcast: https://www.science.org/content/page/about-science-podcast Learn more about your ad choices. Visit megaphone.fm/adchoices

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Can ‘assisted migration’ save forests? And the role of philosophy in science

Can ‘assisted migration’ save forests? And the role of philosophy in science

First up on the podcast, as the planet warms and forests burn, can we replant them with new trees that will thrive in the decades ahead? Associate Editor Katie Langin joins host Sarah Crespi to discus...

17 Syys 39min

Psychoactive substances helped spur Andean civilization, and breaking barriers to education

Psychoactive substances helped spur Andean civilization, and breaking barriers to education

First up on the podcast, producer Meagan Cantwell and freelance journalist Andrew Lawler discuss how psychoactive drugs might have shaped culture in pre-Inca Andean societies. They chat about how tech...

10 Syys 33min

Sex-reversing frogs, and Europe’s rising rates of a deadly tick-borne disease

Sex-reversing frogs, and Europe’s rising rates of a deadly tick-borne disease

First up on the podcast, Senior International Correspondent Richard Stone joins host Sarah Crespi to discuss how climate is pushing the disease-carrying tick Hyalomma marginatum out of its comfort zon...

3 Syys 27min

Making drugs in space, the man who fed India, and what narwhals can teach us about changing seas

Making drugs in space, the man who fed India, and what narwhals can teach us about changing seas

First up on the podcast, will it ever make economic sense to produce drugs and biomedical supplies in space? Associate Online News Editor Michael Greshko discusses his story on the researchers attempt...

27 Elo 49min

Why tracing cyclosporiasis is so tough, and a digestible probe for the microbiome

Why tracing cyclosporiasis is so tough, and a digestible probe for the microbiome

First up on the podcast, the News team’s Diverse Voices in Science Journalism interns Mona Patterson and Laura Martín Agudelo join host Sarah Crespi to talk over some of their reporting from the summe...

20 Elo 28min

A vest for blocking cosmic rays, and updates on NIH funding

A vest for blocking cosmic rays, and updates on NIH funding

First up on the podcast, ScienceInsider Editor Jocelyn Kaiser joins host Sarah Crespi for the latest science policy news. The two discuss recent grant cancellations by the U.S. National Institutes of ...

13 Elo 26min

Did meat or fruit give people big brains, and protecting bison diversity using ancient DNA

Did meat or fruit give people big brains, and protecting bison diversity using ancient DNA

First up on the podcast, Deputy News Editor Michael Price discusses the history of the North American bison population, its decline, and resurrection—and links to Indigenous cultures. He’s joined by U...

6 Elo 38min

AI’s influence on society, measuring muscles, and a Crick biography

AI’s influence on society, measuring muscles, and a Crick biography

First up on the podcast, we catch up with Celina Zhao, a staff reporter for Science’s AI In Science reporting initiative. She talks with host Sarah Crespi about artificial intelligence’s knack for fin...

30 Heinä 46min

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