Illustration of Mars as seen millions of years ago when filled with water and mud. Mars featured considerable quantities of water many millions of years ago, but all large expanses of liquid water have since disappeared. A small quantity has remained as ice, and incorporated into the structure of water-rich substances such as mineral clay and sulphates. | |
Lizenzart: | Lizenzfrei |
Credit: | Science Photo Library / Victor Habbick Visions |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |