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TIL 36% of all mammals are human, 60% our livestock and 4% wildlife.

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LQOn0 TIL that Mark DeFriest, known as the Houdini of Florida, is a prisoner in the Florida State Prison. His original four-year sentence has since developed into 34 years for 13 escape attempts, 7 of them successful, and hundreds of disciplinary reports.
KYQM9 TIL that Grizzly bears in Yellowstone help manufacturers to test if their products are really bear-resistant. If a bear were able to get in a container within that 60 minutes, then the manufacturer would have to go back to the drawing board.
BrP4K TIL of the Eyes of Sibiu, a custom in the city of Sibiu in Transylvania in which roofs are adorned with eye shaped features, creating the feeling perpetually being watched.
56lR TIL Isaac Newton invented calculus as fast as a college freshman class learns it
QNxmk TIL about "Man Engines" which were moving ladders that constantly moved up and down about 10 feet and used to move miners from 1000 ft deep mine shafts by stepping on and off the ladder step at the top of the up stroke, then stepping onto the next step on the down stroke (animation in link)