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TIL while studying flight or fight a biologist grouped guppies in 3 categories "bold" (inspect threat), ordinary (hide), timid (flee). He then put a bass in with the guppies, 40 percent of the timid guppies and 15 percent of the ordinary guppies survived while none of the bold guppies did.

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j6JyM TIL: A sex toy maker agreed to pay customers up to C$10,000 each for selling a “smart vibrator,” which tracked owners’ use without their knowledge. Two hackers had demonstrated the company was collecting information about users, including device temperature and vibration intensity.
Z1PQ TIL A woman and her granddaughter were weeding potatoes in a remote village in Russia when they were approached by a man in a strange orange suit. They asked “Have you come from out space?” Yuri Gagarin replied “As a matter of fact, I have”
N7kDN TIL: John Mulaney used to be neighbors with the 'Cannibal Cop' from New York.
rRZvo TIL the Digeridoo was named by the British based on what it sounded like, and was not originally called the Digeridoo. It was used by aboriginals in Australia when it was discovered, and there are lots of aboriginal names for the instrument, such as Yidaki.
9wKY7 TIL Genghis Khan adopted a policy of strategic marriages. He would marry off a daughter to the king of an allied nation. The king's other wives were dismissed. Then he would assign his new son-in-law to military duty in the Mongol wars, while the daughter took over the rule of the kingdom.