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TIL: The first book featuring a ship going into outer space and meeting aliens was written in the 2nd century AD

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neODY TIL the bluefin tuna is one of the fastest accelerating fish reaching a maximum of 3.27 G, or approximately 32 ms^-2. It would reach a speed of 144 mph if the tuna did it for 2 seconds. That's faster than any car. The bluefin tuna's top speed is roughly 44 mph.
l4ZV TIL some moths have evolved a method of detecting and disturbing echolocation sounds from bats. They can confuse bats by sending false clicks back, they can tell if a bat has found them or not based on the intensity and frequency of a bat’s clicks and they can react accordingly
wLYv8 TIL that Nikola Tesla predicted the modern cell phone in 1926: “We shall be able to communicate with one another instantly, irrespective of distance. Not only this, but...we shall see and hear one another as perfectly as though we were face to face... a man will be able to carry one in his pocket”
LGA9 TIL Louisiana State Penitentiary was founded as a slave plantation, and is still run as a prison farm to this day
OM57 TIL in 1836 a group of young boys discovered a group of 17 miniature coffins buried in a cave outside Edinburgh, Scotland. The coffins contain tiny dolls, each individually dressed, and the coffins all differ in their decoration. No one knows who buried them, when, or why.