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TIL Horses don’t have a horsepower of 1, but rather 15.

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R7XYl TIL The stinging cells of Jellyfish are only around 2 micrometers in size. But can deploy in 0.7 microseconds and generate 7 GPa of penetration at a velocity of 15 m/s. Enough to pierce the shell of a crustacean.
lpA1 TIL it costs $228,288 an hour to operate Air Force One.
Y7GRW TIL about the 2009 satellite collision where two satellites crashed into each other. Three years later a piece of debris from that collision passed the ISS at a distance of 120 m (390 ft) and all crew members had to take refuge inside two docked spacecraft
xVxK5 TIL the official measure/definition of a second (time): The duration of 9,192,631,770 ‘oscillations’ of a Caesium 133 atom at rest and at absolute zero temperature
wLpxJ TIL of "Dogwood Winters" in which late April - early May cold snaps are common. Farmers would predict these by whether or not the Dogwood trees had bloomed, and use this to determine when it would be safe to plant their crops.