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TIL Peru uses an ingenious system of "fog catchers" to make water accessible to residents of capital Lima's low-income neighborhoods. The fog catchers resemble large rectangular sailboat sails, which are composed of nylon nets that trap microdroplets of water.

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m1GPY TIL researchers studying nominative determinism found that orthopedic surgeons are more likely to have the surname "Limb" than is expected by chance (Limb, Limb, Limb, & Limb, 2015)
oxZA TIL Nevada is the most magnetic state (highest percent of adults born in another state) and Texas is the stickiest state (highest percent of adults born in the state that still live there). New York is the least magnetic and Alaska is the least sticky.
nW68P TIL that the landmark pamphlet "Understanding AIDS" was the single largest mass mailing in American history. Spearheaded by Surgeon General C. Everett Koop, it reached 107 million American households, and set standards for sex education regarding the disease. 80% of people read at least part of it.
Me9Ga TIL about the Mafia hypothesis which suggests that certain brood parasites such as the great spotted cuckoo will destroy other species' nests if they do not care for the parasites' eggs
QNje TIL the hypnic jerk, or the twitching of the limbs that accompanies a falling sensation while sleeping, is caused by the brain’s misinterpretation of relaxed muscles as falling. The brain then sends signals to arm and leg muscles in an attempt to regain balance.