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Crested pigeons have specialized feathers that signal danger when they flee from an apparent threat.

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v0KB TIL Lions inhabited many areas of Europe until they were hunted to extinction around 100 BCE.
mxxWx TIL Beaver teeth are orange because they contain iron. This gives them strength and prevents against tooth decay
WR14 TIL Ants conduct war in ways similar to humans - they even use more advanced strategies like reconnaissance and sending expendable ants to the front line as to preserve the stronger ones.
b6XbE TIL that while they are the only Air Assault division in the U.S. military, the Army’s 101st Airborne Division are no longer paratroopers
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