And here is some background of Mars exploration from wikipedia:

The exploration of Mars is the study of Mars by spacecraft. Probes sent from Earth beginning in the late 20th century have yielded a dramatic increase in knowledge about the Martian system, focused primarily on understanding its geology and habitability potential.

Engineering interplanetary journeys is very complicated, so the exploration of Mars has experienced a high failure rate, especially in earlier attempts. Roughly two-thirds of all spacecraft destined for Mars failed before completing their missions, and there are some that failed before their observations could begin. However, missions have also met with unexpected levels of success, such as the twin Mars Exploration Rovers operating for years beyond their original mission specifications.

As of 24 September 2014, there are two scientific rovers on the surface of Mars beaming signals back to Earth.

We hope you like the video.

thanks to Moyan Brenn for the pic