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TIL that the gravity on the ISS is almost the same as it is on Earth. Satellites orbit by constantly freefalling around the Earth, and freefall causes weightlessness.

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jNp7a TIL that hagfish can eat by simply sitting inside a corpse and absorbing nutrients directly through their skin and gills. Their skin is actually more efficient at absorbing nutrients than their own intestines.
9wLnD TIL Hіtӏer supplied Ethiopia with weapons and ammunition during the Second Italo-Ethiopian War
Y766P TIL the typical loss on reselling a diamond is between 25% and 50% of its original purchase price, and even less as a percentage of appraisal value.
R70mj TIL in 1936 a man was killed by a kangaroo. The kangaroo "broke the jaw" and inflicted "extensive head injuries" on the man, who was attacked after attempting to rescue his two dogs. It is the only documented case of a fatal kangaroo attack.
VMVOZ TIL Agatha Christie's in-depth description of using Thallium to poison people in her novel, The Pale Horse, inspired several people to poison others in real life. In some instances, medical professionals who had read the book recognized the symptoms when others had not.