Ancient shoreline features hint that water on Mars once formed a vast ocean.

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

geological signatures indicate that around 3.4 billion years ago, a connected oceanic system existed on a planetary scale, ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...

ESA's first mission to another world, the Mars Express orbiter, began circling the Red Planet on June 2, 2003. Ever since, ...

"The Chinese may well beat the U.S. with a grab sample." ...

The findings potentially solve the paradox of how liquid water seems to have persisted on Mars even when the climate grew too ...

MARS was not always the beaming red we’re so used to seeing in space. Scientists have revealed that it was actually a “blue ...

Mars is absolutely dripping with evidence that the red planet was once a striking blue, complete with glistening lakes, ...

Nearly 14 years ago, NASA’s Curiosity rover landed on Mars for a mission to explore the red planet and discover if it had an ...

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

To land on the right foot on the Red Planet, European engineers have been dropping a skeleton of the four-legged ExoMars ...