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TIL that sirens are designed to trigger fear circuits in the brain.

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e0lwL TIL that instead of saying “the cat’s pyjamas” or “the bee’s knees”, the French say “the baby Jesus in velvet shorts”
AND5B TIL that America built 12 Concrete Ships near the end of WW1 due to a steel shortage. They weren't complete failures but had high running costs and after the war, they were withdrawn from service.
rRvad TIL of the “Desert of Maine,” a 40 acre tract of sand dunes caused by soil erosion from poor farming techniques. The area resembles a desert and has become a tourist attraction.
XEppD TIL that scientists are working to confirm an 80 year old theory that you can turn light into matter by creating a "photon-photon collider" using existing technology to demonstrate the process.
ANbWa TIL in 2019 the Italian fashion brand Max Mara was accused of plagiarizing traditional designs from the Oma ethnic minority in Laos, using their distinctive embroidery and appliqué patterns on clothing without acknowledgment or compensation, essentially exploiting their cultural heritage for profit.