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TIL about Hemigrapsus estellinensis, an extinct species of crab that lived solely in a small saltwater spring in the Texas panhandle, 500 miles from the ocean. Probably a relic of the Pleistocene Era, the species was wiped out when the U.S. Army built a dike around the spring in 1964.

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5YBjr TIL of a legend of Bodhidharma a Monk who fell asleep wall gazing, to stop it happening again he cut off his eyelids. When his eyelids hit the ground they became the first tea plants. This is apparently why the character for eyelids and tea are the same in Japanese.
Yplvd TIL the Coronation Chair used by English & British monarchs, since 1308, for their coronation ceremonies has graffiti on due to Westminster schoolboys and visitors carving their names on it during the 18th & 19th centuries. One tourist carving reads "P. Abbott slept in this chair 5-6 July 1800".
XEDMQ TIL the Hyena is NOT a canine species. Instead it's part of the feliform suborder and thus closer to a cat-like species.
ADamw TIL: Star Trek's Warp Speed "warp factor 1" means travelling at 1x the speed of light. Once in TNG, Riker claims that the Enterprise would need around 20 minutes for a 300 billion kilometer flight at Warp 9. Thus Warp Factor 9 corresponds to a speed of 900 billion kilometers per hour
loLE1 TIL that Necrophoresis is a behavior found in social insects – such as ants, bees, wasps, and termites – in which they carry the dead bodies of members of their colony from the nest or hive area. This acts as a sanitary measure to prevent disease or infection from spreading throughout the colony.