› added 3 months ago

12

TIL only 3.5% of Norway's land is considered arable land

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79OM TIL Underneath Beijing there is a city spanning 33 square miles called Dixia Cheng. It was built in the 1970’s due to rising tensions between China and the Soviet Union.
08mA TIL that smallpox is the first and only disease that has ever been eradicated. Smallpox now only exists in high security labs in Russia and the US. Vaccinations played a major role in achieving this eradication.
jNOKE TIL: Big circles of brick set in the pavement of some San Francisco intersections aren't meant as old-timey street decoration. They mark buried emergency water tanks in case the city ever catches fire again. They were put in after The Great Fire of 1906 (the big earthquake then broke water mains).
5Vd6B TIL Siemens, the unit of conductance, has an old equivalent called "mho". A reverse of ohmΩ, a unit of resistance, with inverted omega ℧.
BeKd TIL: World’s richest woman, Gina Rinehart, wants to use nuclear bombs for mining, bulldoze the great barrier reef to dump mining waste into the ocean and advocates a $2-a-day pay