› added 6 years ago

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TIL At least 98 people are needed to operate an interstellar spaceship over many generations, and create a healthy human population on another world, according to astrophysicist Frédéric Marin.

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M7A6V TIL The crew of Apollo 13 used a 5-inch, metal slide rule, model "N600-ES" made by Pickett as a back up on-board computer. It was a model that was popular among engineers, scientists and students at the time
nWlv9 TIL Leonardo Davinci was famed for buying caged birds at markets and setting them free.
Eg9EX TIL Sub-Saharan Africa has the highest rate of education exclusion globally, according to the UN. Nearly 60% of youth aged 15 to 17 are not in school.
6Em8X TIL one of the reasons why Northern Cheyenne reservation traditionalists oppose coal mining on the reservation is that the 1700s Cheyenne mystic Sweet Medicine prophecized that mining the "black rock" would change the tribe forever.
YVar TIL that pistol dueling with wax bullets was a popular pastime in the early 20th century and even featured as a sport in the 1908 Summer Olympics