› added 10 years ago

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TIL there is an island in the Pacific Ocean that uses huge, immovable stone discs as currency. When a purchase is made, instead of moving a stone disc, it is simply “publicly reassigned” to a new owner.

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J7LV TIL In captivity, a killer whale is usually confined to a small pool, where it spends much time at the surface and often has to swim in a circle. Consequently, the tissue in its dorsal fin doesn’t get much of a workout, and starts to atrophy (wastes away due to lack of use), and it falls over.
W76eB TIL that Viagra increases ability to learn and remember, and lowers risk of stroke...
e05K4 TIL The extreme effect of the solar eclipse eye “sunburn” is a condition called solar retinopathy, which is sun blindness caused by overstimulation of the retina. The retina has no pain receptors, so people who burn their retinas won’t feel it until their vision becomes defective several days later
D1MZv TIL: The number of nuclear weapons in the world is actually down from 70,000 in 1986 to around 14,000 today
7r8M7 TIL U.S. Automakers Developed Coal-Fired Prototypes in the 1980's