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TIL the first paramedics in North America were African American

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6MGZ TIL that the Darian calendar is a proposed system of time-keeping for Mars. The year is divided into 24 months of four weeks; each week has seven days: Sol Solis, Sol Lunae, Sol Martis, Sol Mercurii, Sol Jovis, Sol Veneris and Sol Saturni.
XEebP TIL that, although the ancient Greeks had a myth in which Prometheus is tied to a rock and his liver is eaten every day by an eagle, we did NOT actually learn about "liver regeneration" (the liver's remarkable ability to regenerate itself) until the 19th century.
9YODm TIL The oldest surviving monument to the American Civil War is inscribed in German. It commemorates the men of the 32nd Indiana volunteers, also known as the "1st German regiment", who gave their lives for the Union in 1861.
ZpGwo TIL the release of the trailer for Grand Theft Auto IV caused such a demand on Rockstar's servers that they crashed, causing fans to seek alternate links to the trailer. One user, as a prank, linked the wrong video on a forum. This is the origin of the Rickroll.
X04r6 TIL that certain land snails can sleep for up to three years in hibernation or estivation if the conditions are less than ideal