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TIL the ancient Romans made a poison artificial sweetener out of lead

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O01a TIL: The Velvet Ant (“Cow Killer”) is not an ant, but actually a wingless wasp which can squeak
EgQm0 TIL in World War II several U.S railroad companies sponsored military “railway battalions” to help with the war effort. Company bosses became military officers and 1000’s of American railroad employees joined the effort throughout Europe, Africa and the Middle East.
4klN TIL that in Mandarin, “Cat” is pronounced “Mao” in a a high tone.
l7lXr TIL that E = mc² is always applicable e.g: a compressed spring has more mass than a loose spring. The extra mass can be calculated by inserting the added potential energy into the above equation.
b6Zp TIL that after Star Trek was canceled, Nichelle Nichols (Lt. Uhara) volunteered for a special recruiting project at NASA where she recruited America’s first and second female, as well as black male, astronauts.