Valles Marineris in imagery captured the Mars Reconnaissance Orbiter. Global topography: NASA/GSFC CTX global mosaic: ...

(CNN) -- Colossal canyons across Mars formed eons ago by massive floods of carbon dioxide and solid debris instead of liquid water, according to a controversial report this month. The theory ...

A proposed Mars helicopter mission would search for signs of life, water and future human footholds in a vast volcanic canyon network.

UNLV geoscientist Arya Udry shares what motivates her in studying space, her work on the Mars Perseverance mission, and the world of knowledge a meteorite can bring.

It's a vast system of chasms five times longer and 10 times wider than the Grand Canyon, and scientists think it formed in a similar way. Billions of years ago, Mars was warmer, and covered with ...

Until now, NASA's landers mainly focused on exploring Mars' surface for signs of potential life. They've touched down near volcanoes, valleys, and canyons. But InSight won't be going anywhere like ...

A new model of canyon-forming floods from UMass Amherst and CalTech researchers suggests that deep canyons can be formed in bedrock by significantly less water than previously thought. Disclaimer ...