NASA images reveal shallow ice beneath Mars’s surface, offering a promising water source for future astronauts and clues to past life.

Earth has not always been so hospitable to live. During several ice ages, the planet's surface was almost completely frozen over, creating what has been dubbed "Snowball Earth". Liquid water appears ...

Earth has not always been so hospitable to live. During several ice ages, the planet's surface was almost completely frozen over, creating what has been dubbed "Snowball Earth".

The climate near the equator at the time resembled modern-day Antarctica. Yet even in such extreme conditions, life found a way to keep evolving.

Snowball Earth defines periods of our planet's history when ice spanned the globe, even reaching the equator. The planetary-scale freeze is thought to have been driven by ice sheet expansion ...

Scientists found evidence that during Snowball Earth, thick ice sheets covered some tropical regions, suggesting glaciers blanketed Earth's surface.

During the Snowball Earth period, Colorado was not located at its present northern latitude but instead sat near the equator as part of the landlocked supercontinent Laurentia.

During the Snowball Earth period, Colorado wasn't at its current northern latitude; rather, it sat at the equator as a landlocked part of the ancient supercontinent Laurentia.

What did the snowball Earth look like? Entire continents, even in the tropics, seem to have been under sheets of ice.