› added 9 years ago
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TIL Cold War spy satellites from the 1960s took pictures of 10,000 ancient cities and ruins in the Middle East which nobody knew existed until they were re-examined in 2014. The images were made before modern cities overran many archaeological sites.
lojkB
TIL I learned of an autorotation, a maneuver to stop a falling helicopter during engine failure
0d8l1
TIL The U.S. Army created an entire “Ghost Army” to deceive the Germans in WWII and save lives