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TIL a population bottleneck occurred in human evolution about 70,000 years ago, and one theory for why this occurred is a supervolcano eruption in Indonesia. It caused a volcanic winter, which resulted in a drop of the global mean surface temperature by 3–5 °C.

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wvN7 TIL that Titanic survivor, Katherine Gilnagh, who was 16 when the Titanic sank, didn’t realise the seriousness of the ship’s situation until she reached New York. She thought that disembarking in lifeboats and being picked up by another ship was all part of the journey.
78bE7 TIL that the Aztecs, who lived on an island in the middle of Lake Texcoco, would consume a particular type of fly as a staple high protein food source. The water fly, called ahuautle, was eaten in tortillas, toasted, and mashed into baked cakes.
X0GOj TIL that there are 72 names of scientists, engineers, and mathematicians engraved on the Eiffel Tower
Oo8A4 TIL of ball lightning. Not taken seriously by scientists until the 60s , it is said to be a ball of light seen during a thunderstorm that appear to move on their own. it is a rare and unexplained phenomenon and has only recently been studied by scientists.
OoXgX TIL about "Benjaman Kyle": the only person ever placed on the FBI's Missing Persons page, even though his location was known. Kyle was found naked and injured in 2004 next to a Burger King dumpster in Georgia—and claimed to suffer from severe amnesia. His identity was eventually discovered in 2015.