Around 700 million years ago, the Earth cooled so much that scientists believe massive ice sheets encased the entire planet ...

A series of rocks hiding around Colorado's Rocky Mountains may hold clues to a frigid period in Earth's past when glaciers several miles thick covered the entire planet.

Sometimes, life really does resemble a science fiction movie. For the past couple of weeks, Earth's orbit has been home to a "mini ... that is visible to the naked eye at night is around 6.5 and a ...