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TIL of the Tuskegee Experiments

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j6jBN TIL that All of Earth's water—including oceans, icecaps and glaciers, lakes, rivers, groundwater, and water in the atmosphere—equals ~326 quintillion gallons (326,000,000,000,000,000,000). Of that, a tiny fraction, 37.5 quadrillion gallons, is in the atmosphere above us as water vapor.
OoDlR TIL In 1979 there was an unidentified double-flash of light near the Prince Edward Islands off of Antartica detected by the Vela Hotel Satellite, suspected to be a nuclear test carried out by South Africa and Israel, but no one ever took credit for it.
oRlpR TIL some clothes have a tag with the manufacture date! It’s usually on the shinier little tag. Ex. 07/20 or SUM 09. This brings me joy.
KOjaQ TIL: There is an unit of measurement known as 'smoot' (5 feet 7 inches or 1.708meters)
Y7Jwx TIL about an energy drink sold in the 1920s that was water with (flavorless) Radium, a highly radioactive element. Thousands like Eben Byer suffered “Radium Jaw” (gore warning)