The strongest hints yet that Mars once hosted living microbes are no longer theoretical models or ambiguous chemistry. They ...

NASA’s Perseverance rover has uncovered the most definitive signs yet of an ancient Martian shoreline. The discovery, found ...

"The structures that we were able to identify in the images are clearly the mouth of a river into an ocean." The post ...

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

New evidence of ancient rivers suggests Mars may have been a "blue planet," thanks to an ocean spanning its entire northern ...

New findings from NASA's Perseverance rover have revealed evidence of wave-formed beaches and rocks altered by subsurface water in a Martian crater that once held a vast lake—considerably expanding ...

A 3.5-billion-year old rock discovered on the Red Planet is "the closest we've come to discovering ancient life on Mars," according to NASA. Potential signs of microbial life were found in a rock ...

Mars once had sprawling river systems that rivaled major watersheds on Earth, and scientists have now identified the biggest ones for the first time. Researchers mapped 16 massive drainage basins ...

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

Using images from cameras on Mars orbiters, an international research team has discovered structures on Mars that are very similar to classic river deltas on Earth. These are traces of rivers that ...

New research has mapped 16 extensive, interlaced river systems on Mars, dating back approximately 3.7 billion years to the Early Hesperian Period. These large river systems, despite covering only ...

Scientists suspect that the surface of Mars was once teeming with water, a lush oasis full of river systems and lakes — until a dramatic change in the planet’s magnetic field caused it to lose most of ...