NASA launches robotic rover to seek signs of past Martian life - watch
The $2.4 billion mission, slated for liftoff at 7:50 a.m. ET (1150 GMT) from Florida's Cape Canaveral, is planned as the US space agency's ninth trek to the Martian surface.
NASA's Mars Helicopter a small autonomous rotorcraft in this artist rendition(photo credit: REUTERS)ByREUTERS
