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TIL that a study from Harvard University finds that having no friends can be just as deadly as smoking. Both effect levels of a blood-clotting protein.

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KOpQJ TIL that the term "420" was coined by five students in 1971 at San Rafael High School to signal a meetup at 4:20 p.m. by the campus’ statue of chemist Louis Pasteur to take a hit.They chose that specific time because extracurricular activities had usually ended by then.
d8jPr TIL about Doji Morita, a Japanese singer-songwriter in the 70s, who never shown her face or identity during her career as she always wore a wig and sunglasses. Until today, no one has ever seen her real face or known exactly who she was.
8NrP TIL that Cuba offered to send 1600 medics after Katrina, but the United States rebuffed them - while at the same time welcoming international help
8QZa TIL that because of the number of low-hanging power lines in San Francisco, the city’s fire department still uses handmade wooden ladders, made by on-staff master ladder makers.
4G9b TIL that black panthers are just the melanistic (opposite of albinism) color variant of leopards and jaguars and not an independent species