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TIL of 4-7-8 breathing (inhale 4 seconds, hold 7 seconds, exhale 8 seconds, repeat). Based on pranayama breathing exercises, this "natural tranquilizer for the nervous system" activates the body's parasympathetic nervous system (relaxation) and suppresses the sympathetic nervous system (stress).

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4koMN TIL that in Finnish myth, the World tree in Norse mythology is considered to be an English oak tree that, after it was felled, released its magic to create the universe.
ObOa TIL that The United States Department of Agriculture says a sandwich must contain at least 35 percent cooked meat and no more than 50 percent bread
kWe7 TIL a former governor of Alaska proposed building a pipeline from Alaska to California, to pump fresh water, not oil.
gMogD TIL in 1996, a Canadian man fled Canada and thought someone was out to kill him, took his money and drove to Knoxville, TN. He ended up dead in a parking lot with his money around his half-naked body. Police reports show the man was killed by a blow to the stomach. The case remains unsolved.
1aPEP TIL at the 2008 Beijing Olympics, 7 year old Yang Peiyi wasn't deemed "cute enough" to sing for the opening ceremonies, so they substituted 9 year old Lin Mioke to lip-sync in Yang's place.