Evolve Episode 4 Flight 🎥 Biological Informational Videos | Channify

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Perhaps the most perplexing and controversial aspect of the study of flight is the study of how and why flight evolved. Since flight evolved millions of years ago in all of the groups that are capable of flight today, we can't observe the changes in behavior and much of the morphology that the evolution of flight involves. We do have the fossil record, though, and it is fairly good for the three main groups that evolved true flight.

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