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TIL the Earth’s mantle is so extremely viscous that it takes at least 50 million years to complete a convection circuit. The mantle has only moved an average of 18 feet since the pyramids were built

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8PPV TIL during the Battle of Iwo Jima, Hospital Corpsman John Willis was treating a fallen Marine in a mortar crater when a grenade landed at his feet. He returned the grenade, followed by 7 others thrown by the enemy in rapid succession, all while administering blood plasma. The 9th grenade killed him.
4oO6 TIL that during Clinton’s presidency, then Chairman of the Federal Reserve Alan Greenspan forced Clinton to reduce the deficit by threatening interest rate hikes. Greenspan later wrote in his book about how he singlehandedly put a stop to Clinton’s progressive policies.
0wEYN TIL that a healed femur bone (thigh bone), not the clay pot, is considered as the first sign of human civilization.
neGQB TIL that Egyptian Pharaohs and Deities that weren't known for being born of a God or Goddess had to take part in cannibalistic consumption of a God to take in a power known as hk3w that was later personified as the God Heka.
PYZOO TIL in 1795, the Spanish crown institutionalized the 'purchase of whiteness' through a decree called the 'gracias al sacar'. In the Spanish empire, wealthy mixed race people could now pay for a legal declaration that 'converted them' to white in order to conduct business freely and marry well.