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TIL an experiment gave mice a utopia with social roles to all, no predators and unlimited food. After population boomed reproduction gradually stopped, they became aggressive, isolated themselves and total breakdown in social structures led extinction. Researchers compared it to trends in mankind.

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XJR TIL that 2 billion years ago, a naturally occurring nuclear reactor existed in Gabon, Africa.
Oodm7 TIL Henry VIII may have been a carrier for the rare Kell blood antigen that would have caused his wives’ antibodies to attack their Kell-positive fetuses, resulting in neonatal death
b9lQ9 TIL the largest British ship lost at sea, the MV Derbyshire at 92,000 tons, went down in a typhoon off Japan without ever issuing a mayday call. Investigators found the wreck and concluded the entire sinking could have happened in as little as two minutes. This video simulation is real time.
6YNX TIL North Korea’s most popular browser is Google Chrome, while South Korea’s is Internet Explorer.
6EOxQ TIL the world record for longest stare (40 minutes, 59 seconds) was set in 2011 at an Australian staring competition. At 17 minutes, the crowd became angry. At 30 minutes, contestants said they were bored.