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

Advances in technology have reopened the debate over terraforming Mars, shifting it from an impossible dream to a long-term scientific and ethical question.

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