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TIL that during the Apollo 15 mission, astronaut David Scott carried out a version of the classic Galileo's hypothesis by dropping a feather and a steel hammer at the same time on the surface of the moon. The objects took the same amount of time falling and there by proving the hypothesis.

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MjgB TIL our walking speed is affected by whom we’re with: men’s pace slows down by an average of 7% when walking w/ female partners they’re interested in; women walking together move the slowest; & men walking w/ male friends moved at speeds faster than either man’s preferred walking speed.
xQrB TIL Humans have historically had a issue seeing the colour blue
poZZ TIL For every human killed by a shark, humans kill approximately two million sharks
5mnR TIL a genetic disease called Fibrodysplasia ossificans progressiva causes human tissue to turn into bone. “Sufferers are slowly imprisoned by their own skeletons.”
0dXbR TIL You are taller in the morning. When you sleep, your spine stretches out, making you slightly taller when you first wake up. Throughout the day, gravity causes you to compress again.