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TIL The average number of stars we can see with the naked eye is around 10000. This number is only the 0.000004% of all stars in the Milky Way galaxy.

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via reddit.com

l7oYV TIL the elephant clock was invented by a 13th century guy called Ismail al Jazzari. This invention was a weight powered water clock in the form of an asian elephant. An elephant driver automaton striked the cymbal and a mechanical bird chirped at a specific time.
wLGg7 TIL that honey could kill a baby because of Botulism spores that release toxins causing muscle weakness and breathing issues. Adults don't have the same risk as the stomach acid is strong enough to kill the spores.
JMv TIL Queen Elizabeth used cannabis to help with her menstrual cramps
wLL6M TIL that Nelsan Ellis, who played Martin Luther King Jr. in Lee Daniels' The Butler, died in 2017 at 39, the same age as Martin Luther King Jr.
x8Ok TIL that 29% of San Francisco’s air pollution comes from China