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TIL rust (corrosion) has an estimated worldwide annual cost of $2.5 trillions, roughly 3.4% of the global GDP

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LRb0 TIL that the Aral Sea used to be the fourth largest lake but has been steadily shrinking since 1960. It is draining because the USSR diverted two rivers that fed the sea in order to construct two irrigation canals and build a cotton industry in Uzbekistan.
OoKxL TIL that during the carving of Mount Rushmore there were zero fatalities as a result of accidents. That is 14 years (1927-1941) of carving and dynamite blasts without a death.
wLYvJ TIL that astronauts who return to Earth after a long time in space drop things in mid-air and expect them to float.
XEK7D TIL After officially being prohibited for many years, eating beef in Japan was legalised in 1871 as part of an effort to introduce western culture to the country
OoxdR TIL Evidence for social hunting in Raptor Dinosaurs is basically nonexistent. Scientists believe they behaved closer to crocodiles rather than wolves as is widely accepted.