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136

TIL that since 2017, the USDA has allowed any amount of tongue and heart in ground beef

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via reddit.com

Qe1L TIL that shark teeth are coated with fluoride, which acts like toothpaste and keeps the shark’s mouth healthy and clean.
4XoGJ TIL that skunk spray can't be removed with tomato juice because they are both acids, rather you need combine baking soda, hydrogen peroxide and dish soap to create a base that nuetralizes and removes the smell.
D18bp TIL that stethoscope was invented because the inventor felt uncomfortable placing his ear directly onto a woman's chest
4k6Ga TIL Horseshoe Crabs are more closely related to scorpions and spiders than they are to true crabs
9wPp6 TIL the tendency of teens to be night owls and the elderly to be early birds is an evolutionary safety feature, so at least one person is awake at almost all times