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TIL we have a photograph from the surface of Saturn’s moon, Titan

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w8BM TIL the vision of canals of Mars were a result of a malfunction of Percival Lowell’s telescope that allowed him to see the reflection of his own blood vessels.
NXXj1 TIL Aztecs felt a responsibility to sacrificed everyday, letting blood and cutting hearts to keep the sun in motion. Those sacrificed thought they would come back as hummingbirds.
P1dnn TIL: In 2013, hackers managed to steal credit card data from Target after stealing network credentials from Target's HVAC vendor
8evAa TIL that not only does the Mediterranean Sea have Great White sharks, but that historically they were some of the biggest every caught.
ebMD TIL 3 sailors were trapped in the wreckage at Pearl Harbor for 16 days before they suffocated. Bystanders could hear them but were unable to help them.