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TIL of the doomed 1936 Eiger north face expedition. One climber died during a training climb and half the expedition left. Of the four climbers who remained, two fell during an avalanche, climbing rope wrapped around the neck of another, and the last froze to death inches from his rescuers.

KYjZG TIL John Young is the only astronaut to walk on the Moon and fly the Space Shuttle. He also flew in the Gemini and Apollo programs, commanded the first Space Shuttle flight, and participated in the Spacelab program. He left NASA after criticizing its safety following the Challenger disaster.
ge88 TIL of the “Navy eReader Device”, or NeRD, an e-reader developed by the United States Navy’s General Library Program for use aboard U.S. Navy submarines
8a08X TIL about Kalavati Devi, an Indian mason who was disgusted by people defecating in the streets of Kanpur and has built 4,000 public toilets so that people would not be subjected to a "living hell" regarding cleanliness, especially for women and children.
oBxxY TIL Guards at the Tomb of the Unknown Soldier take an average of six hours to prepare their uniform. They are also required to memorize 35 pages of information about Arlington National Cemetery and the Tomb of the Unknown Soldier, including the locations of 300 graves and who is buried in each one.
5AGR TIL Brazilian businessman Eike Batista’s wealth has decreased by over 99% between March 2012 and July 2013, from a peak net worth of $32 Billion to $200 million and may hold the record for having been the fastest destroyer of wealth.