Life on Earth may have learned to breathe oxygen long before oxygen filled the skies. MIT researchers traced a key ...

When you look at photographs of Earth from space, the planet looks like a blue marble, with patterns of clouds lying on the surface of the marble. It seems as if Earth's atmosphere is incredibly thin, ...

Cleaner air didn’t mean lower methane. New research shows how chemical shifts and La Niña rains pushed methane emissions to record levels.