New research suggests Mars was once a blue planet, as scientists identify river deltas and signs of a vast ancient ocean on ...

On Mars, this period is known as the Pre-Noachian era. Mars has just formed from dust and gas in the protoplanetary disk, just like Earth did. Pieces of debris clamped into a planet with a dense core, ...

The rover’s science instruments found that the formation’s sedimentary rocks are composed of clay and silt, which, on Earth, are excellent preservers of past microbial life. The findings were made ...

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