The European Space Agency (ESA) has released pictures of an ancient, dried-up river system that stretches out for nearly 700 kilometres across the surface of Mars, which is surprisingly earth-like in appearance. The valley stream, which is named Nirgal Vallis, is […]
 
							        
 
					     
					     
					     
					     
					     
					     
					     
					     
					     
					     
					     
					     
					     
					     
					     
					     
					     
					     
					    