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TIL that jawbreakers have been known to explode when left out in the sun, causing serious injuries. This is because the layers of candy within heat at different rates.

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jNGEE Til Horses originated in North America and spread to every Afro Eurasia and South America, only to become extinct in North America where they originated from. They were then reintroduced back to North America by humans. They have been in every continent including Antarctica now.
jN8ZN TIL group of doctors in the US were developing a technique to buy time in treating lethal wounds by inducing the person into a state of hibernation. The procedure included replacing part of the patients blood with chilled saline solution.
WkO8L TIL that the actual name of Nazi variation of the Swastika symbol is Hakenkreuz
jNokv TIL about Coxey's Army. It was the first popular protest march on Washington. Composed of unemployed workers from the United States, the protesters petitioned for government jobs in 1894, the second year of a four-year economic depression that was the worst in United States history to that time.
QbK9 TIL that a “double blind” study means that both the patient AND the researcher don’t know who the control group is and which option the placebo is.