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TIL that the prehistoric giant sloth had hidden "armor" of tiny pebble-like bones imbeded in its skin.

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QA7M TIL In the early days of Facebook, Mark Zuckerberg said People who trusted him were “ Dumb fucks ”
PmVJ TIL that Manhattan Project mathematician Richard Hamming was asked to check arithmetic by a fellow researcher. Richard Hamming planned to give it to a subordinate until he realized it was a set of calculations to see if the nuclear detonation would ignite the entire Earth’s atmosphere.
lodPV TIL about Benson rafts, huge rafts up to 1000 feet long made of thousands of logs lashed together that used to be floated across 1,100 miles of open ocean from the mouth of the Columbia River to San Diego as a cheaper alternative to sending the logs by rail.
rx60 TIL The Trachtenberg system of rapid and high-speed mental calculation was developed by a Jewish engineer Jakow Trachtenberg in order to mantain his sanity while being held in a Nazi concentration camp
Z8D0a TIL of Roger Babson, a man who hated gravity so much, he established a research center to find a way to defeat it.