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Episode 231 - Back to the Water (Secondarily Aquatic Vertebrates)
2:43:15
YouTubeCommon Descent
Episode 231 - Back to the Water (Secondarily Aquatic Vertebrates)
Nearly 400 million years ago, an unusual group of fish gave rise to the first land-dwelling vertebrates. Since then, their descendants have repeatedly moved back into ...
1.7K views1 month ago
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