The most frequent is, Are there,on were there ever, the right conditions for life on Mars?Where is important because where there is waterbon Earth,therebis life.
Mars is dry and dusty planet. It's temparature is much colder than Earth's at an average of - 60 degress Celsius. Mars atmosphere is thinner than Earth's and it is deadly to humans
Scientists believe that Mars onece had a vast ocean. They are now looking for water with space probes. One mission in 2008 found ice on Mars, but not liquid water
NASA's curio sity rover landed on Mars in 2012 equipped with sophisticated instruments. It's objective waas to study samples of rocks, and find out if they contain organic molecules, which are sings of life