New discoveries by NASA's Curiosity Mars rover may not only explain why the Red Planet is a dry, lifeless desert, but that it ...

The new images by the Curiosity rover on Mars show "dramatic evidence" of ancient groundwater in crisscrossing low ridges, ...

Looks like Mars might have had more water than anyone previously imagined.

The second half of the 19th century was a particularly interesting time to imagine Mars. This was a period during which the ...

Mars' opposition occurs about every two years and coincides with the planet's retrograde motion, which began on Dec. 7 and will end Feb. 23. Retrograde occurs when a planet appears to be moving ...

Mars' missing atmosphere may be locked up in the planet's clay-rich surface, a new study by MIT geologists has suggested.. According to the researchers, ancient water trickling through Mars' rocks ...

It's been long thought that Mars shines red due to the rusted iron minerals within the dust that covers the planet -- but a study published Tuesday in the journal Nature Communications suggests ...

Mars orbits at an average distance of 142 million miles (228 million km) from the sun. Its orbit is about 1.5 times the size of Earth's. Sunlight takes about 13 minutes to get to Mars, while it ...