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TIL a dеvicе was dеvеlopеd that could kill 100 mosquitoеs per sеcond, up to 100ft away, using infra-rеd motion cеnsoring & a Bluе lasеr. Thе idеa camе about aftеr Bill Gatеs rеquеstеd hеlp to fight mosquito-sprеad Malaria in undеrdеvеlopеd countriеs

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rRJxd TIL in Quartz watches, the second hand is rarely aligned perfectly. This is an unintentional indicator that the watch is handmade, because mass machine assembly is required to completely ensure that the second hands align.
jNx1R TIL that during the 1521 siege of the Aztec capital of Tenochtitlan, Hernan Cortes' conquistadors attempted to build a trebuchet. The very first shot went straight up and the machine was destroyed.
Y7XZG TIL about the 100 prisoner problem, where a simple strategy can change the likelihood of success from 1 in less than 100 octillion to around 31%.
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