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TIL of the Braess paradox wherein overall traffic flow through a road network may decrease when more roads are added.

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j6dMX TIL Massachusetts is the only state that doesn't allow happy hour.
D1ogY TIL of a bacterium that does photosynthesis without sunlight. Instead it uses thermal "black-body" radiation. It was discovered in 2005 on a deep-sea hydrothermal vent, at a depth of 2400 m, in complete darkness.
R7b7l TIL No Doubt's Don't Speak was originally written as a happy love song with lyrics like "We're always together/We will be forever/such a special treasure;" after breaking up with the band's bassist, Gwen Stefani re-wrote it to reflect her emotional anguish
pY7GQ TIL torrent frogs of Africa sometimes eat other frogs, indicated by the discovery of a small frog skeleton in the stomach of one of a larger frog.
KYMoQ TIL that in a 2006 study, participants who processed a negative experience through talking to a tape recorder reported improved life satisfaction and enhanced mental and physical health relative to those who only thought about it!