Every year, the International Space Station (ISS) delivers some of the most breathtaking and unique photography of Earth.

Indeed, in the cosmic images below you'll glimpse some of the farthest-away views of our humble, ocean-blanketed Earth ever captured by humanity. When we view other objects, worlds, stars ...

The world's oldest rocks are spread across the globe and paint a picture of Earth's turbulent early history. Here are some of the most notable and important formations scientists have discovered.