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TIL where seedless watermelons come from. Much like how a donkey and horse can make a mule but the mule will be sterile, seedless watermelons are the infertile offspring between diploid (22 chromosomes) and tetraploid (44 chromosomes) seeded watermelons.

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dD6rB TIL the UN & Survival International estimate that 100-200 uncontacted tribes (up to 10,000 individuals total) currently exist in the world. A majority of these live in South America with Brazil & National Geographic estimating that between 77-84 tribes reside in northern Brazil alone.
rMQw TIL in Victorian London it was theorized that diseases like Cholera (which killed tens of thousands) were spread by bad-smelling air, until a scientist named Jon Snow determined water was the culprit - he became known as the father of modern epidemiology.
5V7nP TIL the area around Palm Springs, California, one of the hottest, driest places on earth, is sitting on over 100 years worth of water even if they did not receive another drop from any other source. It's 13,000 feet deep and has enough to supply 83 million people a year, yet only 436,000 live there.
nLRG TIL of Ken Allen (1971–2000), an orangutan at the San Diego Zoo. Not only did he escape 3 times, his peers began following his example & escaped too. He outwitted zookeepers even when they posed as visitors. During his escapes, Ken would “peacefully stroll around the zoo looking at other animals.”
XOj6 TIL until the tender age of 12, Shia LaBeouf shit his pants and would hide the boxers around his house.