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TIL that President Andrew Jackson befriended a family of white mice in his bedroom. While his daughter tried to eradicate them with poison and traps, he fed them with grain from his mill business.

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via reddit.com

pYEJQ TIL about a water vapor 100 trillion times the amount on Earth around 12 Billion Light years away
DQxYj TIL Duck is considered a red meat by culinary standards.
v1nKK TIL Only about 10% can freely control the muscle that is stretching the eardrum. "Ear rumbling" is flexing the tensor tympani muscle, that makes the same noise and vibration you sometimes get when swallowing or yawning. Some people can flex it endlessly.
Bp6e TIL the direwolf actually existed, but went extinct 10,000 years ago.
e0RxE TIL That most female cheetahs go their entire lives without raising a single cub to maturity. The species is dependent on "supermoms" that are particularly adept at raising cubs. One such supermom, Eleanor, has mothered at least 10% of all adult cheetahs in the southern Serengeti.