khanacademy.org

womjE TIL: A key factor of animals belonging to the same species is their ability to produce fertile offspring together. So a Great Dane and a Chihuahua could produce fertile offspring, and a horse and a donkey can have a baby together but their offspring will always be infertile.
W799X Today I learned that looking at the rocks lower left of the famous portrait depicting Napoléon's crossing of the Alps by Jacques-Louis David, it is seen that the names of Hannibal and Charlemagne, who had previously crossed the Alps, were engraved.
0dWLy TIL Ancient Egyptian king Menkaure's black stone sarcophagus, carved with niched panels, was discovered inside his pyramid, but was lost at sea in 1838 as it was being transported to England.