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TIL that rodents like rats and squirrels can't vomit, one of the few mammals lacking that trait

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Z8DOR TIL in 1995, NASA astronomer Bob Williams wanted to point the Hubble telescope at the darkest part of the sky for 100 hours. Critics said it was a waste of valuable time, and he'd have to resign if it came up blank. Instead it revealed over 3,000 galaxies, in an area 1/30th as wide as a full moon
8a8AK TIL that the St. Patrick's Day tradition of dyeing the Chicago river green arose by accident when a group of plumbers used green dye to trace illegal substances that were polluting the river. The dyeing of the river is still sponsored by the local plumbers union.
bDn0 TIL in Arthurian legend Arthur’s helmet was called ‘Goosewhite’, his lance was called 'Ron’ and his battlecry was 'Clarence!’
XNKE TIL of the great auk, an extinct bird resembling penguins and living in the north. The last pair were strangled to death in the 19th century.
jGPv TIL in 2003 a man in Belgium stole diamonds worth 100M Dollars after getting past a lock with 100M possible combinations, infrared heat detectors, a seismic sensor, Doppler radar, a magnetic field and security force. He was caught because he left a partially eaten sandwich near the crime scene