Evolution of Mars

Today Mars is a cold desert planet with no visible sign of life.But more than 4 billion years ago, a significant part of Mars was covered by oceans, a key element for life.A stunning video from laboratory NASA Goddard Image shows conceptual evolution of Mars.

Video footage begins with a cloudy sky, a field similar to Earth today, and then the movement, the blue sky and clouds, turning the pale markings on the ground appear once they have been oceans, seas or lakes.