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TIL that the US Air Force jettisoned a nuclear bomb over Quebec in 1950 due to engine trouble in the B-50 bomber. Luckily, the plutonium core was not installed at the time. The USAF covered up the nuclear incident until the 1980s.

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ZpMJR TIL that Spitting Cobras emerged in the fossil record around the same time as early humans. It is speculated that the reason these snakes spray venom is because of the pressure humans in particular put on them. The spraying of venom from a distance countered the humans' use of projectile weapons.
LjOd TIL Approximately 95% of the world population has a natural immunity to leprosy
OobeX TIL for the film Cape Fear, Robert De Niro reportedly took his body fat down to 4%. De Niro also paid a doctor $5,000 to grind down his teeth for the role to give the character 'Max Cady' a more menacing look, later paying $20,000 to have his teeth restored after the film production was over.
mxDQR TIL About The Real Captain America - Master Sgt. Andrew 'Andy' Christian Marckesano - He served 6 full tours in Afghanistan with the 82nd Airborne and the Ranger regiment - Turned Away from the VA Hospital due to full capacity - A few days later he killed two civilians and took his own life.
5VdWp TIL of the Yulin Dog Meat Festival that takes place in the Chinese city Yulin during the summer solstice, resulting in the slaughter of thousands of dogs. Despite a decreased interest and governmental changes that signal a lack of support for the festival, the Yulin Dog Meat Festival continues.