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TIL hot drinks can help cool you down

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BgXpe TIL that suicidal ideation amongst first-year doctors in their first three months of the job increases by 370%.
KOYJQ An extraordinary collection of images from Burns Archive shows the extent to which gas masks were promoted as an essential part of everyday life in the early 20th century. It had been 20 years since the end of World War I, when chlorine gas—and, later, mustard gas—had first been used. The estimates of total casualties from this form of chemical warfare are staggering: 88,000 dead and 1,200,000 injured. With war once again on the horizon, Britain and continental Europe began taking early precautions. In 1938, the British government issued 35 million “General Civilian Respirators”. Everyone from ballerinas to surgeons were encouraged to wear the masks.
pYo1Q TIL Jack Black's parents were both Rocket Scientists and worked on the Hubble Space Telescope
GAy4j TIL the peace sign is also known as "the V sign" in some of the British commonwealth nations, and has various meanings based on how its presented. When displayed with the palm inward toward the signer, it can be an offensive gesture similar to showing the middle finger, dating back to at least 1900.
mjvE TIL that the first successful production to synchronize sound, color and motion picture was produced by Jehovah’s Witnesses