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TIL Lions inhabited many areas of Europe until they were hunted to extinction around 100 BCE.

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GYgQN TIL when firing the Germans biggest cannon in WW1, they had to move 300 yards away and fire it electrically. They were still so close they required cotton wadding in their eyes, nose and ears, and fired it with their mouth open to prevent the gun from blowing out their ear drums.
ejak TIL that the US uses less water now than it did in 1970
p5ep TIL that months after Genghis Khan sacked Zhongdu (Beijing) in 1215, the bones of the vanquished were thought to be white-capped mountains from a distance, and the approaching roads were nearly impassable from the grease of decomposing victims.
a7No TIL emotional crying is the result of very high levels of stress hormones building up in your body. Crying releases these hormones, resulting in feeling of relaxation and security.
epyK4 TIL the characters "Perry the Platypus" and "Knuckles the Echidna" do represent the only two families in the monotremata order. Which means Platypus and Echidna are the only two families of egg-laying mammals on Earth.