› added 11 years ago

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TIL 3% of Washington DC’s population is HIV positive, on par with some West African countries

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XEapX TIL some women have superhuman vision, seeing 100 million colors due to the genetic mutation: tetrachromacy. The rest of us see 1% or less of that. They see 100x variations in color that appear the same to everyone else. A path of dull grey stones may look like a glittering jewellery box to them
P1jre TIL worldwide, around 65% of adults are affected by lactose malabsorption. Lactose intolerance is the ancestral state of all humans before the recent evolution of lactase persistence in some cultures, which extends lactose tolerance into adulthood.
E1goW TIL that still today 50% of marriages are arranged worldwide.
mPZo TIL when Google built a neural network and connected it to YouTube, it spontaneously taught itself to recognize cats with 74.8% accuracy.
DmNe TIL of María Santos Gorrostieta Salazar, the mayor of Tiquicheo Mexico, survived three assassination attempts and despite her wounds refused to resign. In 2011 her term as mayor ended and her police protection was withdrawn. In November 2012 she was abducted, stabbed and brutally beaten to death.