› added 7 years ago

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TIL that a polar bear won't set off an infrared motion detector.

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awEPZ TIL: In the United States, you can sell dietary supplements with no safety or efficacy testing at all if you don't "make specific medical claims" or use a known poison as an active ingredient. The FDA can only remove a product from market after "substantial" deaths or injury occur.
E1VAx TIL that weaver ants (Oecophylla) direct their larvae to produce silk, which is used to bind leaves together to form water resistant nests for the colony.
N8MJ TIL that the deepest layer of the ocean, the hadopelagic zone, is named after the realm of Hades, the Greek underworld. This ranges from 6000m (3.7 miles) deep, down to the very lowest reaches. Populations are sparsest here, and are believed to be sustained by marine snow and thermal vents.
4kBQX TIL that Chien-Shiung Wu, a Chinese-American physicist, made critical contributions to the Manhattan Project during World War 2. Her experiments disproving the law of conservation of parity in weak nuclear interactions, known as the "Wu experiment," earned her the nickname "the First Lady of Physics
pYxop TIL that the Chicago Railroad Fair inspired Walt Disney to create Disneyland