› added 13 years ago

448

TIL that American Indians weren’t considered citizens of the U.S.A until 1924.

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wLJAY TIL a study found that 37% of men produce viable sperm in their pre-cum
9YlDB TIL that digital cameras were developed so spy satellites could send images back to earth more quickly. Before digital cameras in 1976, spy satellites used film. After the film was shot, the satellites loaded the footage into capsules and dropped them from orbit into the atmosphere for collection.
Z84Mp TIL that NASA astronaut Scott Kelly took a gorilla suit with him to the International Space Station and used it to play a prank on British astronaut Tim Peake.
65wZ TIL the Qibya massacre, occurred in October 1953 when Israeli troops under Ariel Sharon attacked the village of Qibya in the West Bank. Sixty-nine Palestinian Arabs, two-thirds of them women and children, were killed. Forty-five houses, a school, and a mosque were destroyed.
9bdQ TIL that the windshield of the SR-71 Blackbird can reach a temperature of over 600°F during flights at mach 3. It had to be made of quartz and was ultrasonically fused to the titanium hull in order to handle the stress.