Their new paper in Nature Communications shows that Mars’ magnetic field, which could have supported life, might have lasted until about 3.9 billion years ago. This is later than the estimated 4 ...

First, Mars' volcanic activity was previously ... then the eruption likely happened between 3 billion and 3.5 billion years ago, which is when researchers suspect the crater was full of water.

The nakhlites may have appeared on Earth some 11 million years ago, but they left Mars an estimated 1.3 billion years ago in the current Amazonian period. Hence, nakhlites represent one of the ...

Mars is a planet divided in two ... In the scenario researchers envisioned, a large ocean was present around 3.65 to 3.68 billion years ago. It likely had a frozen surface. Over the following ...

Today Mars is a cold and dry desert – but it may have been covered in rivers, lakes, and seas around four billion years ago. Even as recently as 3.1 billion years ago, it may have still had ...

Researchers say they have found the remains of a crater left 3.4 billion years ago when an asteroid impacted ... Share on Flipboard (opens in a new window) The Mars of the past was very different ...

An illustration shows a hypothetical picture of Mars 3.6 billion years ago when an ocean may have covered nearly half the planet, released February 24, 2025. The blue areas show the depth of the ...

Today, Mars is cold and dry ... The 100-mile-wide crater was formed by an asteroid impact some 3.5 to 3.8 billion years ago. It was chosen as Curiosity’s landing site because of the many ...

This study suggests an ancient ocean deposited rocks on Mars' surface 3.5 billion years ago. The ocean's surface probably froze, and over the subsequent 230 million years, it gradually receded and ...

Even as recently as 3.1 billion years ago, it may have still had "shimmering ... "We calculated the “aquifer layer” on Mars could hold enough water to cover the planet in a global ocean ...