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TIL the deepest mine in the world, Mponeng in S. Africa, has rock faces 140-degrees due to proximity to Earth’s core, and is inhabited by “ghost minders” – pale criminals armed with AKs and beer bottle grenades who reside in the shafts for months at a time to steal gold.

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e0RV5 TIL that cruise ships can emit as much particulate matter as a million cars every day and the air quality on deck can be as bad as the world’s most polluted cities.
VMnPm TIL Tesla's space travelling Roadster passed Mars, Mercury and Venus in 2018. It's estimated that the Roadster will continue in its elliptical orbit until coming close enough to Earth in 2091 to be seeable by a telescope. It might then crash into Earth millions of years in the future.
xQB1 TIL Google Maps calculates their traffic by having all iPhones that have Google Maps open and Android phones that have location services turned on send anonymous bits of data back to Google
b9aXj TIL multiple American POWs in the hands of the Japanese were used as subjects in medical experiments. In one such experiment, an anesthetized prisoner had his entire lung removed, and in another, doctors drilled through the skull of a live prisoner.
voOD TIL in 2006 FBI warned of KKK members in the police force