› added 10 years ago

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TIL Yellow speed limit signs in the U.S. are recommended speeds but are not enforced.

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JYynm TIL Vantablack isn't a color but a surface application of nanotubes (Vertically Aligned NanoTube Array) that trap/move photons until they convert to heat - thus creating the "black" color through the absence of light
J0Yj TIL that sand is a finite resource and we are running out.
0dEej TIL the international space station (ISS) took 10 years and 15 countries working together to assemble
grEQ8 TIL - van Gogh's "Starry Night" (1889) may have been inspired by Hokusai’s "Great Wave" (1831). Van Gogh was a great admirer of this Japanese print, had written to his brother Theo about it, and both share a similar coloring of rich blues.
a7PN TIL Volvo invented the three point seatbelt and it gave free license to all other auto manufacturers to use it.