You've probably heard that birds evolved from dinosaurs, but it's sometimes hard to understand exactly how that could have happened. Especially the flying part. How does an animal that can't fly evolve to do so? It's not like you can take baby steps towards flying; you either can do it or you can't. Except, maybe that's not so true. Here's the story of how birds first took to the sky.
From Feathers To Flying
Different Roads To The Skies
How Did Dinosaurs Evolve Into Birds?
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