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TIL of the old jewish cemetery in prague. Dating back to 1478, it has gotten full so many times and they just kept adding layers. Now there are 12 layers of graves stacked on top of each other. There are about 12,000 visible tombstones but over 100,000 people buried there.

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via reddit.com

0wKJM TIL the University of Southern California's Spirit of Troy is the only collegiate band to have two platinum records. They have performed at the Oscars, the Grammys, on Fleetwood Mac's "Tusk", for five U.S. Presidents, and at the fall of the Berlin Wall.
R7NAw TIL that only 7 companies in the world control almost every single beauty product you buy. These 7 conglomerates own around 182 brands across the globe. They also are responsible for advertising and the way we think about beauty.
oQVY TIL a scientist got a call from his dad saying that the wetlands they used to visit together were extremely polluted and would disappear. He went back and created a recovery project. Paying 90% of expenses by himself he started to clean the lake, and 3 years later thousands of birds had returned.
Lk8eV TIL of Valentin Dikul. At 16, doctor's told him his legs won't work after sustaining a back injury. He taught himself rehabilitation, became a circus performer, and is now the head of rehab of MSK diseases in Russia. He is known for juggling his famous 80kg kettlebell
R7yXl TIL that Sir Isaac Newton invented the first color wheel. Before his experiments, the better notion was that all colors were mixtures of Red (most light) and Blue (most darkness). Newton thought it was BS so he did light mixing experiments.