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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.

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yQ68v TIL about "Pele's tears" and "Pele's hair" which are named after the Hawaiian fire goddess of volcanoes, Pele. Pele's tears are small pieces of solidified lava drops, whereas Pele's hair is thin strands of volcanic glass. Pele's tears are often found on one end of a strand of Pele's hair.
4X1oX TIL Rags, who became a World War I dog hero, was originally just a stray pup picked up by a couple of American soldiers in July of 1918. He carried messages from one US infantry division to the next tucked under his collar. He was buried with military honours when he died in 1936.
D1g1e TIL: In the 1990s, the South African government dismantled all of its nuclear weapons, the first nation in the world which voluntarily gave up all nuclear arms it had developed itself.
OopKL TIL Dean Martin refused to attend JFK’s inauguration because Sammy Davis, Jr (who helped Kennedy campaign) wasn’t allowed to attend because he was black.
5Y0VR TIL that ducks can adjust their penis size based on how many female ducks are around.