Mars may have been a "blue planet" with an ocean the size of today's Arctic Ocean, a new study suggests.

Using images from cameras on Mars orbiters, an international research team has discovered structures on Mars that are very ...

About 670 million people live in high-mountain areas worldwide. Experts sound alarm after mountain collapses without warning: ...

A groundbreaking study has unveiled Antarctica's hidden, rugged topography beneath its ice sheet, revealing mountains, ...

Olympus Mons is a giant volcano on Mars. It is the tallest mountain in space. It is almost three times higher than Mount ...

"The structures that we were able to identify in the images are clearly the mouth of a river into an ocean." The post ...

Backed by a National Science Foundation grant of more than $500,000, Pfeifer, the lead principal investigator, and a team of ...

Deserts cover roughly a third of Earth’s land surface, and they’re far more varied and extreme than most people realise. […] ...

Prepare to be amazed as scientists unveil two astonishing mountains on Earth, soaring more than 100 times taller than previously known peaks! These hidden giants challenge our understanding of geology ...

Three billion years ago, you could have stood on Mars and watched a river spill into a sea. That picture is still speculative ...

The red planet was half blue, according to space scientists. A research team using images from cameras on Mars-orbiting ...

Climate warming reduces nectar quality in flowers, leaving migrating monarch butterflies with less energy to survive winter.