› added 11 years ago

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TIL the vertical smoke lines you see in nuclear explosions are caused by smoke rockets and not the explosion itself

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via reddit.com

M7QMb TIL the oldest known Earth rock was not discovered on Earth, but was a meteorite found on the moon
LkPm0 TIL that in the 1940s, US funded doctors went to Guatemala to test STD treatments by deliberately infecting 1,308 locals between the ages of 10 and 72 with gonorrhea, syphilis, and chancroid, all without their informed consent. The US doctors gave only 52% of subjects any treatment. 83 died.
4kVoN TIL about The Battle of Stamford bridge. Where a lone Viking warrior attempted to hold off an army of nearly 15,000 men. The unnamed viking was able to take down 40 men before falling.
pYBLp TIL Popeye the Sailor was originally a supporting character, intended to go away after one storyline
BYkb TIL that Space temperature can never get lower than a minimum of just 2.7 Kelvin or -270.45 Celsius, the temperature of the cosmic microwave background radiation, which permeates the entire Universe.