leonardodavinci.net

Eg9Od TIL Leonardo da Vinci designed a 12-barreled rapid-fire type of machine gun which was intended to be both lightweight and quite mobile on the battlefield. While he worked on such weapons for the benefit of his patrons, he also did so out of intellectual curiosity.
XEX6P TIL that Mona Lisa painting has its own mailbox due to the large amount of love letters and flowers from admirers.