Its ChristmasThis artist’s impression shows how Mars may have looked about four billion years ago. The young planet Mars would have had enough water to cover its entire surface in a liquid layer about 140 metres deep, but it is more likely that the liquid would have pooled to form an ocean occupying almost half of Mars’s northern hemisphere, and in some regions reaching depths greater than 1.6 kilometres.Wallpaper Android Red Child Line PatternFeather Abstract Black Dark PatternSpace Star Night Sky Pattern FlareBokeh Nature Lights BlurLine Abstract Cool Night Art PatternLake Mountain Dark Calm NatureFunny 06Mountain Peace Dark Sky NatureCall Of Duty Blackops Game Illustration ArtColorful 252Square Space ArtSnow Solo Mountain High Nature Blue FlareCar Audi Drive Interior Motor ManBill Cosby With Sesame Street ElmoColorful 310Cute   215Mountain Forest Summer Wood NaturePeople   453Colorful 129