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TIL there’s a kind of fish where some males build nests and help raise their young, and other “sneaker” males just swim by and ejaculate into those nests while the males that built them are trying to mate.

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PYY8w TIL Tom Petty needed an actress to be a dead woman for a music video. He explained his choice by saying "She's got to look really good, or why would [I] keep her around after she's dead?" I thought, Kim Basinger would be good. I'd probably keep her for a day or two, let's go see if she would do it."
mrly TIL In 1951, a scientist at Johns Hopkins Hospital created the first immortal human cell line with a tissue sample taken from a young black woman - Henrietta Lacks. Those cells, called HeLa cells, quickly became invaluable to medical research & saved millions of lives.
d8vEj TIL that the decibel (dB) scale is logarithmic instead of linear. The difference between a rock band and an airplane taking off is only about 10dB.
BgBly TIL that future British Prime Minister Anthony Eden carried a letter bomb in his suitcase for a whole day, thinking it was a Whitehall pamphlet that he would read later in the day. He only realized it was a bomb after being warned by the police, who were informed by MI5.
EgWrp TIL the 1966 song "River Deep – Mountain High" which was written by Phil Spector, cost a then unheard of $22,000 ($207,000 in 2023), and required 21 session musicians. It was reported that the Beach Boys' Brian Wilson attended the session, where he sat "transfixed" and "did not say a word."