The moon is turning red, and it's l

The moon is turning red, and it's likely Earth's fault. Our planet's atmosphere may be causing the moon to rust, new research finds. Rust, also known as iron oxide, is a reddish compound that forms when iron is exposed to water and oxygen. But not all celestial environments are optimal for rusting, especially our dry, atmosphere-free moon. "It's very puzzling," the study's lead author, Shuai Li of the University of Hawaii, said in a statement. "The moon is a terrible environment for [rust] to form in.