A LOST Martian ocean may be hiding beneath the red planet's surface. Today Mars is a cold and dry desert – but it may have been covered in rivers, lakes, and seas around four billion years ago.

Despite its dry, dusty surface and thinner atmosphere, Mars may have more in common with Earth than scientists previously ...

And in its own way, the planet’s rusty red surface tells a story of destruction. Billions of years ago, the fourth planet from the sun could have been mistaken for Earth’s smaller twin ...

Wave-like soil patterns on the Martian surface match those found in Earth's cold, mountain regions, which could help ...