› added 6 years ago

83

TIL of the Kármán line, defining where atmosphere stops and space begins. Below 100km the "air" belongs to the country its over, but above 100km is free space.

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VMV04 TIL that in the 70s the US and Soviet baby feared the other had developed a new antisubmarine weapon that damaged wires rubber attached to probes due to deep circle holes left in the rubber, it turns out that these were in fact the bite marks of the relatively unknown cookie cutter sharks
gMm9A TIL Unit abbreviations start with a capital letter when they are named after someone (e.g. K for Kelvin, Hz for Hertz ...), otherwise they are lower case (e.g. m for meter, s for second …)
woYp8 TIL: Tom Brady was selected in the 18th round of the 1995 MLB draft by the Montreal Expos (so he was technically the last active Expos draft pick)
yVy5a TIL that birds are now using anti-bird spikes to build their nests.
ZpZQp TIL that the girl who played Cindy Lou Who in the 2000 movie, “How the Grinch Stole Christmas” grew up to be the lead singer of the rock band “The Pretty Reckless”