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TIL that caffeine has a paradoxical effect on some people (with ADHD) - it makes them sleepy.

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P1eOw TIL earthworms are hermaphrodites. Each carries male and female reproductive organs. When mating, two individual earthworms will exchange sperm and fertilize each other's eggs.
ynlv TIL that the fire hydrant is believed to have been invented by an engineer named Frederick Graff, but this can’t be verified because the patent was destroyed in a fire at the patent office in 1836.
1a8vV TIL that the song "Dirty Creature" by New Zealand new wave rockers Split Enz makes (metaphorical) reference to Taniwha, powerful beings believed by the Maori to inhabit treacherous waters. Tim Finn had been suffering panic attacks, and co-wrote this song to try to contend with his suffering.
Y7VRv TIL that the oral history of the Klamath indigenous people describes the eruption of a volcano and subsequent creation of Crater Lake in Oregon, events that geologists date to almost 8,000 years ago.
PYjyE TIL (US-Style) Biscuits are generally of a better quality in the South because they require soft-wheat, which is grown and sold in the South almost exclusively. Soft wheat is better for biscuits but worse for bread - the opposite is true for the hard wheat of the North and West of the US.