› added 10 years ago

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TIL that spacecraft designers have to contend with a poorly-understood phenomenon known as “cold welding” where clean metal surfaces can spontaneously weld themselves together in the vacuum of space.

Read more esa.int

via reddit.com

jNwop TIL A British police force, Thames Valley Police, released a video explaining sexual consent by using tea as a metaphor.
oML7 TIL of “Mr. Trash Wheel”, a solar-powered device in Baltimore’s Inner Harbor that has removed 160 tons of garbage from the harbor in just under a year.
vPpR TIL that praising a child’s intelligence is counterproductive and ultimately makes them dumber. However, praising the process of problem solving makes a child smarter.
ZpvG4 TIL about escheatment. Traced back in feudal times and still exists in modern times.
5Yl48 TIL of Leon Ray Livingston—a famous hobo and author who traveled under the name “A-No. 1.” He perfected the hobo symbols system, which let other hobos know where safe places were, always dressed immaculately, and retired after the lifestyle “bought him to the brink of psychological collapse.”