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TIL LCD screens are polarized

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Z8OOB TIL David Lee Roth, former front man for the rock band Van Halen, became a state-licensed emergency medical technician in New York in 1997 and has been on over 200 individual rides as an EMT.
loox1 TIL that a "domino computer" was once constructed, that could add two three-bit inputs and produce a four-bit output. It was made of dominoes standing on end, and relied on timing and precise placement when they were knocked over.
Zp89D TIL that the United States poisoned alcoholic beverages during Prohibition, killing an estimated 10,000 people overall.
yVDDM TIL that an object you were observing can disappear beyond the event horizon the point of no return around a black hole.
G8r5 TIL of Officer Norem. He responded to a call about a suicidal man trying to jump over the overpass fence into the traffic below. Noren grabbed the guy’s leg and refused to let him go - even when the suicidal man took out a knife stabbed Norem several times, he still held on until help arrived.