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TIL that Abraham Lincoln created the secret service just hours before he was assassinated.

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6EPKX TIL that the first Christian marriage in what is now the US was between a white man and a black woman.
Br9mx TIL of Nebraska Man, a purported ape species found in Nebraska based on a set of teeth. Turns out the teeth actually belonged to a peccary and were just heavily weathered.
moPP TIL that in a BBC poll of 22 major countries’ perceptions around the world, Pakistan was the only country that rated it’s own influence on the world negatively.
X0Jlj TIL before the Large Hadron Collider (LHC) was completely constructed, there were concerns among the public that its high-energy experiments would lead to the formation of micro black holes or strangelets, a dark-matter-like particle that can convert all matter it touches into strange matter.
6EBwY TIL that scientists in Botswana have started painting eyes on cow's rumps to deter lions from attacking them. Protecting the livestock from lions also protects the lions, as local farmers no longer have any reason to shoot or poison them.