Evolutionary biologist Neil Shubin spent six years in the Arctic searching for a fossil that could be a missing link between sea and land animals. In 2004, Shubin discovered Tiktaalik roseae, a 375-million-year old creature that was part fish, part land-living animal.

On this episode of Big Brains, Shubin shares the story behind his discovery of Tiktaalik, what it has meant for the understanding of human evolution, and how it has impacted the future of genetic research.

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