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TIL that the Ancient Romans would piss on their clothes (or let strangers relieve themselves in a bowl and collect the urine), let it break down into ammonia, mix it with water and stir the mixture with their feet to clean their laundry.

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aweWA TIL that the FIRST individual in human history to denounce racism in a documented account was the Prophet Muhammad of Islam.
LkZlp TIL There is a phenomenon called refraction that affects the direction of sound propagation. During the day, the sound bends away from the ground; during the night, it bends towards the ground. Hence at night you have additional "sound" reaching you, making it louder.
jNX8Q TIL Conan O'Brien won a charity auction for a walk-on cameo role of How I Met Your Mother... he plays a random dude in the background at the bar
epxbE TIL of Herxheim, a mass grave/ritual center dating back to ~5000 BC. It is estimated that >1000 individuals were cannibalized at this site as ritual sacrifices.
Br6bb TIL Albrecht von Wallenstein was the most successful Catholic general of the 30 years war, upon realizing the war was futile and could last decades he tried to organize peace only to be assassinated by his emperor. He was proven right with the war lasting another 14 years and 6 million more dead