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TIL, The largest pearl in the world reaches 34 kilograms in weight.

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WV08 TIL the zero-gravity scenes in Apollo 13 are actually real. The crew filmed 4 hours of material in 612 parabola flights.
PY6ew TIL that from 1948, until 1963, all young men in Britain between the ages of 18, and 30 had to serve two years (later four) national service in the military.
0wlGy TIL that in 1910, black sailors of the Brazilian navy mutinied and gained control of all of Brazil's large battleships. They then used the threat of bombarding Rio de Janeiro to successfully force the abolition of the slavery-like conditions they suffered under in the navy.
X0Jx6 TIL there is a database of 'haunted' houses in Hong Hong, which lists properties where a death has taken place. If a violent death has occurred, the property may lose up to 30% of its value. Once properties appear on this database, it is virtually impossible to remove them.
9YJLG TIL A leopard gecko's tail houses much of its spinal cord; when grabbed, it detaches, a blood clot forms, radial glia (RG) cells multiply & regrow a tail. Humans lose RGs as adults & scar tissue would block RGs. Scientists believe RGs & bypassing scar tissue are keys to human spinal cord healing.