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TIL Janet Jackson's Rhythm Nation music video produces a resonant frequency capable of crashing the hard drives of older laptops.

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BrEVD TIL that the Soviet Union sent an unmanned spacecraft to the moon in an attempt to bring back lunar soil. It was in lunar orbit as Armstrong and Aldrin performed their famous spacewalk. It crashed on the lunar surface hours before the Apollo astronauts lifted off for their return to Earth.
6OrW TIL psychopaths aren’t affected by the contagiousness of yawning
QNgQp TIL it is possible to kill yourself in your sleep. This condition is called parasomnia pseudo-suicide
rN19W TIL spermine, which is found in semen, is over 3 times more toxic than cadaverine and putrescine, which produced during the decomposition process.
78DDX TIL the Permian–Triassic extinction event that occurred approximately 251.9 million years ago is considered Earth's most severe known extinction event. 57% of biological families, 83% of genera, 81% of marine species and 70% of terrestrial vertebrate species became extinct.