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TIL Horses can distinctively lock major joints in their legs so they can sleep while standing up. There is also buddy system to protect other horses from predators.

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v15j7 TIL Lula oil field in Brazil is considered to be the western hemisphere's largest oil discovery of the last 30 years.
Eg457 TIL in 2002 Fentanyl was used to end the hostage crisis in the Moscow Theater
OBP6 TIL you should look away from your computer every 20 min. and gaze at something 20 ft. away from you for 20 sec. to help with computer eye strain - called the “20-20-20 rule”
VMdVG TIL that in 1933 6000 people were deported by the Soviet Union to an island in the middle of Siberia and were abandoned there without food or shelter. Within three weeks most of the prisoners were dead due to the widespread episodes of cannibalism. The island became known as “Cannibal Island”.
epKED TIL that the condor cluster is a U.S. army supercomputer made up of 1760 PlayStation 3s from 2010