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TIL about Operation Sea-Spray, a secret biological warfare experiment in which the U.S. Navy released two types of bacteria over the San Francisco Bay area in September 1950. The government did not disclose the experiment's existence until 1977.

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kn74 TIL that British actor Julian Glover has a role in the The Star Wars, Harry Potter, Game of Thrones, Doctor Who, James Bond, and Indiana Jones series…
VR68 TIL an orca from Seaworld named Kandu V, attempted to bite a newcomer ocra, but broke her own jaw and bled to death in front of thousands
Pkpe TIL of the Persian social custom of Taarof, where every business owner is obliged to refuse payment, and every customer is obliged to insist on paying anyway, sometimes going back and forth up to 3 times
6EQQ TIL that our Galaxy’s name, the Milky Way, comes from the story of the Greek God Hera spilling milk while breastfeeding an unknown infant.
kJ8b4 TIL that In April of 1815, Mount Tambora exploded in a powerful eruption that killed tens of thousands of people on the Indonesian island of Sumbawa. The following year became known as the “year without a summer” when unusually cold, wet conditions swept across Europe and North America.