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

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

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

On a battered rock in an ancient Martian riverbed, a pattern of dark, rounded patches has jolted planetary science. These “leopard spots” do not just look strange, they line up uncannily with what ...

Thin, seasonal ice may have protected ancient lakes on Mars, allowing liquid water to last for decades despite cold ...

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

A mudstone sample from Jezero Crater shows textures and minerals that on Earth often form through microbial activity. Scientists caution that nonbiological processes could also explain the features, ...

INDIANAPOLIS — Roger Wiens has been a Mars explorer since he was 11 years old. He grew up as a kid looking through a telescope at The Red Planet with his brother and sketching its features. “That was ...

NASA announced it found promising potential biosignatures on Mars. Potential biosignatures are things like chemicals and structures that could be a result of life on the planet, but more research was ...