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TIL a man had a heart attack at a grocery store in rural Minnesota, 20 people lined up and performed CPR on him for over an hour and a half until paramedics arrived and he survived.

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oBGlo TIL the reason snow is able to absorb sound is because it is porous. Snowflakes are six-sided crystals, and they are filled with open spaces.Those spaces absorb sound waves, creating a quieting effect over a blanket of snow.
m1nKy TIL about the Abiotic Petroleum Theory, which explains that hydrocarbons could generate in the mantle and then migrate through deep faults to Earth's crust (in addition to biological processes).
08av TIL the first American spy satellites literally dropped their film from space in a “film bucket” that was then scooped up in midair by a plane
Rdpl TIL scientists once recruited theater students to drunkenly stumble into bars, to test whether bartenders over-serve patrons. They found that bartenders were more likely to over-serve drunk women than men.
R7n68 TIL of the Vela Incident, A nuclear explosion in the Indian ocean of unknown origin. The most widespread theory is that it was a joint Apartheid South African-Israeli nuclear test.