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TIL spiked dog collars made their first appearance in ancient Greece, designed to protect the dogs throats from wolf attacks

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a887A TIL that sloths have algae, fungi, moths and insects growing in their hair. Some of the fungal strains are showing uses in treatment for malaria, chagas disease and even breast cancer.
Eg8Wp TIL Robin Williams final film was directed by the former lead singer of Gutterboy, whom Geffen Records signed to a $1 million record deal in 1989, an unheard-of sum at the time. The band was dropped after its debut and was dubbed one of the most "successful" unsuccessful bands in rock history.
PKpg TIL the US was one vote away from introducing hippos in its swamps
wooko TIL Warthogs don't actually have warts. Their "warts" are really just tough protective skin to help cushion blows during fights.
Ob5e TIL that your nose is always visible to you. Your mind ignores it through a process called Unconscious Selective Attention.