The results of the planet’s first annual physical—a complete health check—are in, and they are alarming. We are deep into the yellow danger zone and moving rapidly towards the red high-risk zone, ...

Explore 25 Major Events in Earth's 4.5 Billion Year History. Discover pivotal moments from its formation to the rise of life.

Imagine traveling back in time over three billion years. You wouldn’t recognize Earth. There were no green forests, no ...

The first color image of the whole Earth prompted people to think of home, and the environment, in a new way, writes Stewart Brand.

Scientists are working to solve a mystery of Earth’s molten outer core, which lies more than 2,000 kilometers beneath our ...

The first photo of Earth from space, taken just 65 miles above our planet On October 24, 1946, 11 years before the launch of Sputnik I, a 35-mm motion picture camera onboard a V-2 rocket captured a ...