Mars may have been a "blue planet" with an ocean the size of today's Arctic Ocean, a new study suggests.

Arcadia Planitia does not draw attention in the way Mars’s great canyons or volcanoes do. It sits quietly across the northern ...

Scientists say that moisture extracted from the atmosphere on Mars could provide an important water source for humans living ...

Scientists have traced ancient Martian shorelines inside a giant canyon, revealing where a vast ocean once stood and why ...

This doesn’t mean Mars causes ice ages on its own. Orbital cycles are only part of the picture. Earth’s oceans, atmosphere, ...

Mars has an active, electrically charged surface where dust storms and spinning dust devils regularly move and reshape the ...

Mars today is a frozen, dusty desert. But if you look deep inside Valles Marineris, the largest canyon system on Mars and in ...

New simulations show red planet affects Milankovitch cycles that shape how solar energy is distributed on Earth over millions ...

A study by scientists at Penn State and NASA shows that intact biomolecules from dormant microbes break down much more slowly ...

Researchers worked out the ocean's size by finding how high the water level got in the Solar System’s largest canyon system.

NASA is quietly ending financial support for independent planetary science advisory groups, according to a letter posted to the agency’s website on January 16. The affected groups have historically ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...