"But we see these valleys beginning at a large range of elevations. It's hard to explain that with just ice." Using computer simulations, Steckel and her team dove into what Mars might have looked ...

At first glance, Mars appears very different from Earth ... This ice cap is bigger than Texas, and is mostly covered in water ice and solid carbon dioxide, aka dry ice. Heading south, we'll ...

Martian ice is not a novelty in itself ... a slow sinking from the vibrant to the moribund. Lowell thought Mars was covered with canals because it was drying out and that the canals were an ...

There is plenty of water on Mars, but most of it is frozen in the polar ice caps and buried underground. Despite the chilly temperatures, there could be liquid water underneath the surface ice in ...

In a recent paper, researchers proposed searching for photosynthetic bacteria embedded in the snow and ice around Mars' mid-latitudes. Using "radiatively habitable zones" on Earth as a template ...

Visit ancient Mars -- a surprisingly temperate planet ... was only about 75% as bright as it is today. Sprawling ice caps may have covered the highlands around the Martian equator, occasionally ...

A new study led by a University of Calgary scientist has found evidence that suggests Mars once had a carbon cycle, giving ...

Though Mars, the Red Planet, is a vast and inhospitable land today, scientists think it once resembled our very own Earth — the Blue Planet, if you will. More specifically, experts say Mars once ...