› added 9 years ago

132

TIL The doctor who discovered that hand washing prevented the spread of disease was thrown in a mental institution for his crazy ideas.

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7nZr TIL that spiders tune each strand of their web to a specific frequency by making some strans tighter than others so that when something is caught in it, the spider can easily pinpoint where it is. This is also used for determining whether what cause the sound is a food or a potential mate.
NXPa1 TIL not only does water only block 20% of UV rays with 3 feet of depth, but also the water surface reflects UV rays so being around water increases UV exposure
8amJV TIL there are many countries that still have charges, trials and sentencing for witchcraft.
aPb0 TIL Gandalf carried another lesser ring of power while Frodo sought to destroy the One Ring in “The Lord of the Rings”
VMBaD TIL The code to inform US troops that South Vietnam was lost and should be evacuated instantly, was a weather report followed by the song "White Christmas"... in April.