Call Me Stormy

Finding righteous currents in turbulent times

When Fish First Breathed Air

Four hundred million years ago, a group of fish would undertake one of the most important journeys in the history of life and become the first vertebrates to live on dry ground. But first, they had to acquire the ability to breathe air. So how did these animals, which had been adapted for millennia to life under water, learn how to breathe? PBS Eons host Kallie Moore takes an in-depth look at the group’s incredible journey.

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