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TIL that the United States has been in a conflict in 93% of it's existence.

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via reddit.com

65Ql TIL there’s been a treaty that bans controlling the weather as a weapon of war since 1978.
VMEJm TIL the number of days Phil (Bill Murray's character) repeated Groundhog Day in the movie was 38, but in actual time it was calculated to be 8 years, 8 months and 16 days.
Ypwvx TIL that men and women see colors and motion differently. Objects that appear orange to women look yellowish to men, and objects that appear green to women look blue-green to men.
lpeV TIL Merriam-Webster’s headquarters in Springfield, MA has had a strict “silence” policy for over 60 years. Before email communication was conducted either behind closed doors or via 3x5 notecards.
6Egr7 TIL in 1997, a physics student demonstrating the Leidenfrost effect by holding liquid nitrogen in his mouth accidentally swallowed the substance, resulting in near-fatal injuries. This was the first case in medical literature of liquid nitrogen ingestion