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Today I learned head on train collisions were staged for entertainment in the early 1900’s.

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XEZAR TIL the US Navy replaced expensive and clunky periscope controls on submarines with Xbox 360 controllers, which reduced training time from hours to minutes
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d80Pd TIL that rocking back and forth or moving in general activates the hippocampus while learning and memorizing things. Some people chew gum instead of the back and forth rock. Recall improves while moving and learning, and recalling things 5 times over a spread of days can burn in the working memory.
9O5B TIL a single Black Mamba snake killed 9 African villagers in a hut in an evening–the next morning locals found a hungry baby, 9 bodies, and a very defensive snake.
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