› added 3 years ago

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TIL ordinary cheap computer hard drives do not work reliably above 10,000ft in altitude, because they require a cushion of dense air for the magnetic head to float on. Without that air density, the head will scratch the disk. People who live above 10,000ft must buy special hard drives.

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1847 TIL Two baby girls were switched at birth in 1931 at the Leiden University Medical Center. Suspicions didn’t rise until two decades later, when the girls met at a wedding and wondered at their mutual likeness to each other’s family.
XAeX TIL: Richard Feynman was divorced for doing too much calculus
kEKm TIL Apollo Mission astronauts have nearly five times higher mortality from cardiovascular disease than other astronauts due to exposure to deep-space radiation.
Y9Xv TIL that the weird white spots you see when you look up at the blue sky are actually white blood cells moving through blood vessels in your retina.
ZnrD TIL that in-sink garbage disposals were illegal in New York City until 1997, and are still banned in restaurant kitchens.