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TIL that rats who were trained to press a lever for food stopped pressing the lever once they saw that it also caused another rat to receive an electric shock

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j6r6p TIL The baby Sacajawea carried for 2000 miles was Jean Baptiste Charbonneau. He was delivered by Meriwether Lewis, raised by William Clark, lived in a German castle for six years, spoke four languages, was a military scout, fur tapper and gold miner. He’s buried in an Oregon ghost town.
yQxjJ TIL There is a miniature replica of the Eiffel Tower in Greece
VBnQk TIL Victor Fleming directed both The Wizard of Oz and Gone with the Wind, and did both in the same year (1939).
ODEL TIL that the element Francium is so rare, that only 30 grams of it exists within the earth’s crust.
xVG91 TIL that 6.57 Billion (90% of the world’s population) lives in the Northern Hemisphere