In February, conservationists released 158 young tortoises onto Floreana Island in the Galapagos. The Floreana tortoise subspecies had long been thought extinct, but the discovery of close relatives on another island made a captive breeding effort possible.

SciFri turtle correspondent Charles Bergquist talks with conservationist Penny Becker about the science behind the reintroduction, and what it was like to return the species to an island that had not seen them since the 1850s. Plus, the latest on sea turtle nesting season, and an ancient sea turtle stampede.

Guest:
Dr. Penny Becker is CEO of the nonprofit Island Conservation.

Transcripts for each episode are available within 1-3 days at sciencefriday.com.

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The military use of AI is capturing headlines this month. After a dustup with the Pentagon, the AI company Anthropic is out, and OpenAI is in. Meanwhile, in the US war with Iran, AI is being deployed in ways we’ve never seen.

To make sense of it all, Host Flora Lichtman talks with journalist Karen Hao, who covers AI and is the author of the book Empire of AI: Dreams and Nightmares in Sam Altman's OpenAI.

Guest:
Karen Hao is a tech journalist and author of the book Empire of AI: Dreams and Nightmares in Sam Altman's OpenAI.

Transcripts for each episode are available within 1-3 days at sciencefriday.com.

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On social media, the vagus nerve often gets billed as the gateway to nervous system nirvana: It’s your ticket to better rest, relaxation, and health if you “stimulate” it correctly. Where did this idea come from, and what does the research say?

Host Flora Lichtman talks with neurosurgeon Kevin Tracey, a pioneer of a field called bioelectronic medicine, which uses techniques to stimulate the nervous system with electricity. Back in the 1990s, he was the first to discover that the vagus nerve regulates the immune system and inflammation.

Guest:

Dr. Kevin Tracey is a neurosurgeon, and president and CEO of the Feinstein Institutes for Medical Research at Northwell Health. He is the author of The Great Nerve.

Transcripts for each episode are available within 1-3 days at sciencefriday.com.

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