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TIL the Earth's radius is about 21km (13mi) smaller at the poles compared to the equator.

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DQAOp TIL A 1965 study on social isolation in monkeys reported that while no monkeys died during the isolation, 1 of 6 monkeys isolated for 3 months refused to eat after release and died 5 days later. A 2nd animal refused to eat and would have died had they not resorted to forced feeding.
b6Rp7 TIL when Chuck Peddle & Bill Mensch introduced the 6502 microprocessor at a trade show in 1975, it was faster & cheaper than its competitors ($25 each instead of nearly $200). It almost single-handedly forced the price of processors to drop, helping to launch the personal computer revolution.
ZpyDG TIL about Tetrachromats - people with a special receptor in their retinas that allow them to see millions of colors that most of us can’t distinguish!
QA9d TIL: A chimpanzee, which was raised as a human being, by a psychologist. Learnt sign language, dressed herself and ate with silverware, was shipped away to assimilate in wild, expressed “hurt” via. sign, and later died.
OQYa TIL Although Wal-Mart made $15.7 Billion last year, they are asking for Thanksgiving donations for underpaid employees.