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TIL humans live closer to the time of the T-Rex than the T.rex lived to the time of Stegosaurus

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WkMgL TIL Banana slugs have both male and female sexual organs, and often play both roles during sex. Additionally one slug may bite the penis off of the other slug after sex, allowing that slug to only play the female role in future sexual encounters, essentially eliminating a male competitor.
dDDw8 TIL that in 2013 snipers opened fire on the Metcalf Power Substation in San Jose, California. In just under 10 minutes, they disabled 17 transformers and caused $15m in damages. The attackers are still unknown and the motive is still unknown.
5oO9 TIL it’s “mother lode”, not “mother load”.
KYQv6 TIL that Indiana cardiologist Edward Harlamert broke the Guinness World Record for stents (34) by implanting at least 41 into his patient's coronary arteries, for a total of 48 stents in the man's chest. (Harlamert is now named in a malpractice complaint for stents by said patient and others.)
0w90N TIL that dogs can suffer under the "Happy Tail Syndrome", when they wag their tails out of happiness so hard and often that it gets injured