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TIL The Bingham Canyon Mine in Utah is almost 4000 feet deep (that's 3X as tall as the Empire State Building). It's the largest man-made excavation and the deepest open-pit mine in the world. It's also visible to the naked eye from space.

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GDBN TIL Switzerland has over 3,000 points of demolition to stop invaders, w/bridges rigged to detonate &/or fall on railways, artificial landslides, & hidden artillery are set. On the German side, ALL tunnels are rigged, & mountains are hollowed for whole divisions. Military deception is everywhere.
v1lj4 TIL that in 2007, a group of researchers tried treating Arachnophobia without the use of any spiders, but by showing arachnophobes images with spider-like features. After the treatment, some test subjects were comfortable petting a tarantula in a terrarium.
kA1d TIL As recently as 2009, China had elementary schools wholly sponsored by big tobacco. One in Sichuan had a message at the front gate that said “Tobacco can help you become an achiever”
e0Bxg TIL Target owns the license for Targét, the pseudo-French pronunciation of Target
6MA7 TIL that the French Navy uses distorted proportions of 30:33:37 on the Flag to give better optical proportions