› added 9 months ago

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TIL that every element burns with a different color flame. Spectroscopy, study of these colors, has shown that the same elements exist all over the Universe.

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OGaZY TIL: Kodak advertised a wind up movie camera using the image of the Hindenburg, with the tag line being “moments that make history”, a year before the Hindenburg was filmed with one when it was destroyed at Lakehurst, NJ
D1pnv TIL that Before the Civil War, uniforms were custom-sewn. Such a massive number of people had to be outfitted that uniforms needed to be mass produced. Soldiers were put into subtypes: large, medium, and small—classifications that eventually found their way to civilian clothing.
r7gy TIL humans have a relatively low level of genetic variation because we are all descendants of ~10,000 humans that survived a massive extinction event ~70,000 years ago. One tribe y'all.
l1aV TIL that the oldest existing and continually operating educational institution in the world is a university in Morocco (University of al-Karaouine)
yQ0DJ TIL circular indentations on plastic milk jugs have a purpose! The soft, flexible plastic design will bulge if the milk has spoiled, allows extra room for expansion if frozen & absorbs damage from falling.