› added 3 years ago

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TIL The communal chatter of snapping shrimp colonies on the ocean floor created enough white noise that the U.S. Navy successfully hid submarines near them during WWII, avoiding detection by underwater Japanese hydrophones.

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via reddit.com

jN5oM TIL that ornithologists often use Cheetos to study behaviour in crows. Along with being easy to spot, they’re also one of the birds’ favourite snacks.
OZ04 TIL in 1970, about 200 members of the Youth International Party, AKA Yippies, invaded and occupied Disneyland’s Tom Sawyer Island and had to be removed by riot police, causing the 2nd of only 4 unscheduled closings in Disneyland history.
AvLg TIL the Soil Conservation Council of Canada suggests gardeners bury underwear to determine soil quality. If after two months only the waistband remains, there is a good amount of organic matter in the soil.
0wQk1 TIL about the Kentucky Miner Who Scammed Americans by Posing as Hitler With ‘Invisible Spaceships’
XEakE TIL Although GPS is free for the world to use, it costs $2 million per day to operate. The money comes from American tax revenue.