And if it comes to that, wrist, elbows, and lungs? Neil Shubin found that fish in 375 million-year-old rocks in the Canadian Arctic. It was the earliest known evidence of what Neil calls the Great Transition, when life was about to emerge from water to land.

Support the show: https://www.patreon.com/clearandvivid

Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.