Jupiter’s moon Europa is on the short list of places in our solar system seen as promising in the search for life beyond Earth, with a large subsurface ocean thought to be hidden under an outer shell ...

During the last ice age, the Atlantic Ocean's powerful current system remained active and continued to transport warm, salty ...

Mars may have been a "blue planet" with an ocean the size of today's Arctic Ocean, a new study suggests.

The vast majority of our planet’s oceans remain unexplored, hiding secrets that challenge everything we thought we knew about ...

Mars today is a frozen, dusty desert. But if you look deep inside Valles Marineris, the largest canyon system on Mars and in ...