› added 12 years ago

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TIL the most powerful h-bomb in history had a mushroom cloud that reached almost twice as high as the height from which Felix Baumgartner jumped a week ago

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Y9Xv TIL that the weird white spots you see when you look up at the blue sky are actually white blood cells moving through blood vessels in your retina.
N71a6 TIL the U.S. has a region nicknamed "Cancer Alley" where 150+ petrochemical plants operate. Cancer rates there are 53.33% higher than the national average.
GBKE TIL sundial cannons were used by European royalty in the 18th century, it incorporates a cannon with a fuse that is lit by an overhanging lens, concentrating the rays of the sun, and causing the cannon to fire at noon, signifying the time for their midday meal.
MeMg8 TIL that the inside of a tornado is filled with blue lightning, and many little tornadoes. The air is smooth, not turbulent, but hard to breath.
l78EV TIL about Archie Karas, a Greek gambler who turned $50 into $40 million in 3 years playing poker in Las Vegas before losing it all