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Don't worry, it's not a fair measure of fitness.

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X0owj TIL in 1971 a Time Dilation experiment had 2 flights w/atomic clocks go around the world to prove Einstein's theories of relativity (time moves slower as you approach the speed of light, and/or when exposed to less gravity). The clocks gained 0.15 microseconds compared to the ground based clock.
GAw8j TIL that Stephen Hawking was born exactly 300 years after the death of Galileo - today would have been Stephen’s 83rd birthday
v1V78 TIL an eagle stole a rabbit from a fox, carrying both into the air as the fox fought to hold onto his meal. The mid-flight tug of war over the rabbit was caught on tape by wildlife photographer Kevin Ebi in Washington State's San Juan Island National Historical Park.
5emB TIL over half of all fourth-graders in U.S. public schools received free or subsidized ($0.40) lunches in 2011
kO1jd TIL that in 1974, KFC Japan started selling family sized Christmas dinners including chicken, cake and wine. They became so popular that they now require ordering weeks in advance to prevent waiting in line for hours. They account for about a third of the chain’s yearly sales in Japan.