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TIL that Johny Cash had a younger brother, Tommy Cash who also is a country singer and is still active.

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6E4eW TIL that in 1948 a high school student by the name of Randy Gardner stayed awake for 264.4 hours for a science fair project. He was monitored by a Stanford sleep researcher and contributed notably to the science community. Following he slept for 14 hours and suffered no observable health issues.
a88Zb TIL about Kendall Myers, the grandson of the first full-time editor of National Geographic (credited w/ having built the magazine into the iconic publication that it is today) and also great grandson of Alexander Graham Bell is serving a life sentence in the U.S.'s only supermax prison for espionage
rKBM TIL that since 1985 the Saudi government has ordered the destruction of 95% of Mecca’s historic buildings, most over a 1000 years old. It’s estimated that there now fewer than 20 buildings left from the time of Muhammad.
ZRYG TIL every single Official London Black Cab driver must pass a test called “The Knowledge” in which they have to learn 25.000 streets, 20.000+ landmarks and 320 basic routes that are located within a six-mile radius of Charing Cross. Some people take up to 5 years of studying to pass it.
R7dbl TIL aggression is negatively associated with intelligence. Unintelligent people may experience more frustration, which may lead to aggression. This may also be explained because aggression and intelligence share biological factors.