› added 1 year ago

62

TIL that flashing lights in the sky during a seismic event called “earthquake lights” are a thing

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via reddit.com

9wxgX til, largely because the tech industry has so wholeheartedly embraced work-from-home, activity in San Francisco’s downtown remains at roughly a third of prepandemic levels — lower than in about 50 other major cities
DQwyr TIL: Early wireless TV remote controls (1956), commonly known as "clickers", didn't have batteries or electronics. When you clicked the button, an ultrasonic sound was emitted by the button striking the bar. This sound was picked up by the TV to operate it.
OGy0X TIL that the huns were fans of gold. TIAL (Today I also learned) that the vandals were originally a German tribe who were fans of art. TIAL that the goths were split into two; the Ostrogoths had a cathedral in Ravenna; Basilica of Sant'Apollinare Nuovo.
KWwR TIL that giant anteaters do not produce any stomach acid. Instead, the combined sting venom (formic acid) found in all of the ants it eats is used to digest the prey once it is ground up and swallowed - the ants are digested in their own venom.
6ELmY TIL That beyond the 3 states of matter; solid, liquid and gas, there is a 4th state called plasma which is an aggregate of charged ions. Not only does it occur naturally in lightning and on the surface of the Sun it can also be produced in the laboratory.