Science news articles about 'ancient mars'

... was present 4-5 kilometers below the ancient Martian surface, the team wrote, due to ... cemetery of microbes. "If any microorganisms existed on ancient Mars, the watershed would have been a great place ...

Papers by Brown University scientists show that water on ancient Mars was pervasive and was working hard, changing the minerals below ground and on the surface. The paper in Nature by planetary ...

... analyzed data from the Gamma Ray Spectrometer onboard NASA's Mars Odyssey reports new evidence for the controversial idea that oceans once covered about a third of ancient Mars.

... four billion years ago, the surface of Mars would have been challenging for life. No matter ... acidic, oxidizing brines like those inferred for ancient Mars. "People have known for hundreds of years ...

... Nature, shows that vast regions of the ancient highlands of Mars -- which cover about half the planet -- contain ... back to what is called the Noachian period of Mars' history, about 4.6 billion to 3.8 ...

Valleys on Mars were carved over long periods by recurring floods.

A Texas-size asteroid may have sparked a U.S.-size landslide on ancient Mars, says a new study that hints at the origin of a mysterious red planet region.

Unique fractures in lavas on ancient Mars suggest water occasionally flooded portions of the planet's surface.   The fractures, known as "columnar joints," are the first that have been observed on a ...

A University of Colorado at Boulder research team claims "the first definitive evidence of shorelines on Mars."

Scientists say rain-fed Martian rivers may have carved valleys and filled craters.

Climate cycles persisting for millions of years on ancient Mars left a record of rhythmic patterns in thick stacks of sedimentary rock layers, revealed in three-dimensional detail by a telescopic ...

Climate cycles persisting for millions of years on ancient Mars left a record of rhythmic patterns in thick stacks of sedimentary rock layers, revealed in three-dimensional detail by a telescopic ...