Geek Trivia: The map in the moon

Geek Trivia: The map in the moon: "Leonardo da Vinci... postulated that the sunlight reflected by the Earth's oceans and clouds in turn shone on the moon and reflected back—giving the dark portions of a less-than-full moon distinctive features, particularly when the moon was near the horizon. Today, we call this phenomenon Earthshine or—perhaps more appropriately—the Da Vinci Glow."