6th August 2012 was a crucial day when NASA's Curiosity (rover) made a historic landing on the Red Planet. It's been three years that NASA sent it's car-sized spacecraft to investigate the Martian climate and geology. The rover is further exploring the possibilities of the environmental conditions favorable for microbial life on Mars. Curiosity is the fourth unmanned surface rover of NASA sent to Mars since 1996.
In these three years, Curiosity has made many significant discoveries including the water below the surface of Mars. And NASA is expecting many more to come.
Here are some awesome photographs that Curiosity captured in the first three years of roving the Martian surface.