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TIL Tapwater contains 2 mg/L of chlorine to remove germs and bacteria.

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VvBm TIL: Killer Whales, aka Orcas, are actually not whales–they’re the largest member of the Dolphin family.
nWdpb TIL the American Terex Corporation supplied Iraq with weapons technology in the 1990s, likely at the direction of the CIA and British Intelligence.
R5wp8 TIL of Rasa von Werder, popularized female bodybuilding, competing along with Arnold in "Best Body" competitions. She also worked as a stripper and minister, later creating her own church. In 2008 she ended 30 years of religious celibacy because God told her to become a "cougar".
rReQd TIL about an Indian art called Shatavadhana, where a person has to remember and answer questions on a stage from 100 people simultaneously while dealing with distractions in a round robin manner. The tasks vary from making up a poem spontaneously to keeping a count of a bell ringing at random.
xEx5 TIL during The Battle of Shiloh, many soldier’s wounds were luminescent. Those with glowing wounds had a higher chance of survival, hence the name, “Angel Glow”.