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TIL ancient Romans used urine to whiten their teeth. When left out too long, urine decomposes into ammonia, which is a great cleaning product that takes out stains easily.

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eX6n TIL of Vitaly Kaloyev, a Russian man who lost his family in a 2002 airliner collision. 2 years later Vitaly tracked down the air traffic controller responsible for the crash, murdered him in front of his family, served 3 years in prison, and then returned home to a hero’s welcome.
ZyJ4 TIL Lego minifigures have a hole on top of the head in case any kids got one of the heads stuck on their throat. That way they would be able to keep breathing.
W4PA TIL In 1986, Scott Weiland met bassist Robert DeLeo at a Black Flag concert in Long Beach, California. The two of them were discussing their love interests, when they realized they were both dating the same girl. They developed a bond over the incident, and ended up forming Stone Temple Pilots.
dMDj TIL that buried within the code of GoldenEye for the N64 is a fully-functional ZX Spectrum console emulator complete with ten games. It wasn’t discovered until 2012.
wLe1P TIL Philip Seymour Hoffman didn't want his children to be "Trust Fund Kids" so he didn't make a trust for them, which resulted in a $12 million tax bill that he could have avoided if he made a trust and exercised proper estate planning.