Why do we yawn?
- Curious questions, Human body, Life Science
- October 17, 2014

400 million years ago, the oceans on the planet looked very different than they do now. One strange inhabitant of these oceans was a fish called a coelacanth: it had giant blue scales and four fins that stuck out from its body on lobes. When it swam, it would move these fins much like a
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