Mars is 80 million km further from the Sun than Earth, making it much colder with temperatures ranging from -30 to -150 degrees Celsius. Despite its smaller size, Mars has a thin atmosphere mostly of carbon dioxide and a surface rich in iron deposits. Over recent decades, probes have greatly expanded our understanding of Mars, revealing signs of weathering and past water flow. In 2003, the Spirit and Opportunity Rovers found features resembling dry lake beds, suggesting water once existed. The Mars Odyssey probe indicated ice beneath the surface, and in 2008, the Phoenix Rover confirmed the presence of water near the Martian North Pole.

What significant findings did the Mars Rovers Spirit and Opportunity reveal?

What discovery did the Phoenix Rover make regarding water on Mars?