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TIL Metal music is called metal because it’s harder than rock

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GYVP5 TIL, that hagfish slime expands by 10,000 times in a fraction of a second, it is 100,000 times softer than Jell-O, and can fend off sharks
woxM7 TIL that on December 26th, 1862, Abraham Lincoln ordered the hanging of 38 Dakota men in Mankato, Minnesota
9wOQX TIL Apple's mobile chips (bionic, A series) are surprisingly not yet on ARMv9 instruction set (ratified in 2021)
ANYQ7 TIL there's an unexplained global effect called "The Hum" only heard by about 2-4% of the world's population. The phenomenon was recorded as early as the 1970s, and its possible causes range from industrial environments, to neurological reasons, to tinnitus, to fish.
0dWeM TIL I learned about Saudade, The feeling of sadness that comes from being nostalgiac and knowing you’re never going to have that experience again.