› added 2 years ago

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TIL sci-fi author Issac Asimov contracted HIV in 1983 through a blood transfusion.

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oB5bE TIL Continuous ingestion of Colloidal Silver [an alternative medicine] can cause skin to turn an irreversible blue/grey color - a condition called Argyria
gQoD TIL there is a super rare blood type called RH Null that only around 10-40 people in the world have.
OG6ag TIL bears in Yellowstone can eat 40,000 moth grubs per day.
eDbD TIL that the high five was invented by an openly gay athlete, and was a symbol of gay pride and identification.
M8kb TIL the top sumo referees carry a dagger, to symbolize killing themselves if they make a bad call