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TIL data centres use an estimated 200 terawatt hours (TWh) each year. That is more than the national energy consumption of some countries.

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6Eopw TIL Aniseed ball candies were used as timing devices for underwater mines during WWII, as each had precisely the same spherical shape and consistently dissolved in water after 35 minutes, leaving the saboteur time to escape
VjO4 TIL that Canadian citizens can send mail to various government offices postage free
Gx4g TIL that despite knowing that a ceasefire would occur at 11am, many Generals continued to send their troops into battle right up until the last minute. Hundreds of lives were wasted on the final day of World War I.
jmev TIL that in Japan, where “lifetime employment” contracts with large companies are widespread, employees who can’t be made redundant may be assigned tedious, meaningless work in a “banishment room” until they get bored enough to resign.
YpNMv TIL about the Tyranny of Small Decisions, a phenomenon where small, individually rational decisions can lead to large and undesirable outcomes, and the irreversible destruction of desired alternatives.