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TIL that in some parts of Ruhr region (Germany) the ground has sunk by up to 30m (12m in average) due to exzessive mining in the region. The homes of millions of people would be flooded if the pumps were stopped to keep the groundwater level artificially low. These pumps have to pump forever.

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a8E1L TIL that philanthropist and engineer Avery Fisher was motivated to start his own company after, identifying a way to save his employer $10,000 a year, was immediately denied a $5/week raise.
e0Ld6 TIL 10-year-old Olivia Farnsworth has never been able to feel pain or hunger, and cannot sleep without being heavily medicated. Due to her symptoms revolving from Chromosome 6 Deletion, she had been able to withstand a car accident without distress.
R7Qjl TIL that a Russian psychologist Bluma Zeigarnik found in 1927 that waiters remembered orders only as long as the order was in the process of being served. Unfinished work continues to exert an influence, even when we try to move on to other things. This phenomenon was called The Zeigarnik Effect.
mQbp TIL that Nazi Germany’s most successful interrogator never used torture to get information; he instead befriended prisoners. He later helped create mosaic art for Disney.
nW8o7 TIL that early RV’s in the 1920’s were referred to as Housecars and were often modelled after airplanes, boats and buses.