› added 2 days ago

TIL about Tau (τ), a mathematical constant that is the ratio of a circle's circumference to its radius, that in 2010 was proposed to be the replacement of π.

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via reddit.com

nQyG TIL hormonal birth control impacts which men women are attracted to
mxaav TIL an Iranian F-4 Phantom was attempting to shoot down a drone. The drone was being escorted by an F-22 Raptor which is a stealth fighter. The F-22 flew underneath the F-4 to examine it's munitions all without the F-4 noticing. The F-22 then told the F-4 "you really ought to go home", and it did.
p8bgN TIL about "Princess Caraboo", an impostor who feigned being a princess from a far off island and fooled an entire British town before being found out after a few months.
4Gm6 TIL The man who invented the technology Thermos used to keep liquids hot or cold never patented his invention. Despite the vast commercial success of his invention within his own lifetime, he died having never profited from it at all.
M715a TIL that despite its cultural presence as the doomsday scenario, current models and estimates believe that a nuclear winter is not a realistic outcome following a nuclear war. One analysis said so many successive things would need to go wrong it was akin to a coin landing on heads 40 times straight