TIL three of the four US presidents that were assassinated were killed in a 36-year time frame between 1865 and 1901.
TIL Ty, the manufacturer of Beanie Babies, was one of the first businesses to use the internet to engage directly with its consumer market. This was a major contributing factor to the popularity of Beanie Babies.
TIL about the Windows XP wallpaper. The image is called "Bliss" and it's a supposedly unedited image of a hill found on the Los Carneros American Viticultural Area. The photographer, Charles O'Rear, says he took it on his way to visit his girlfriend. Eventually in 2000, he was contacted by Microsoft
TIL Winfield Scott developed the Anaconda Plan, capture the Mississippi River and blockade Southern ports, but it was derided by most Northern newspapers and Scott eventually left Lincoln's administration. Ultimately Grant used a strategy similar to Scott's Anaconda Plan to win the Civil War.
TIL that the Apollo 11 landing site was chosen purely for technical and safety reasons, which is why the famous footage takes place on a mostly featureless plain. Later Apollo missions landed in valleys, next to canyons, and at the foot of mountains.