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TIL that in the 60s, a small town in New Mexico built an underground elementary school capable of withstanding a 20-megaton nuclear blast.

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E1vAV TIL that cats can actually be allergic to humans. Humans shed hair and skin (dander), which may cause an allergic reaction in cats. In some cases, it causes asthma-like symptoms and can also cause miliary dermatitis (i.e. cat dermatitis).
7rG4p TIL that after Speedo released the LZR Racer in 2008, 93 world records have been broken by swimmers wearing an LZR Racer and 33 of the first 36 2008 Olympic medals have been won wearing it as of 24 August 2009. Its “technological” advantage led it to be banned from further high end competitive use
NDZJ TIL in 1947 the US government simulated a biological warfare attack by spraying bacteria on the entire city of San Francisco without informing the residents or obtaining consent, in violation of The Nuremberg Code.
jEaN TIL Yoga Jones, from Orange is the New Black, was the voice of Patti Mayonnaise.
EpOp TIL Amethyst is Greek for “not intoxicated” because the stone was once thought to protect the owner from substance abuse.