Will we be doing orbiters or landers?

BBC: ��Six minutes of terror��

If all landers make it to the surface of Mars, they will represent three more flags on a largely unexplored map.

BBC: Gusev crater (Nasa)

The twin landers, each the size of a desk and weighing 375 pounds (170 kilograms), will ramble dozens of meters a day, drilling into rocks and scooping up soil in preliminary field studies to help identify ancient oases.

CNN: Race to Mars begins a distant search for life