NASA's Curiosity Rover Drills Into 2nd Mars Rock
The 5-mile (8 km) journey is expected the take months, as Curiosity's top speed across hard, flat ground is about 0.09 mph (0.14 km/h).http://www.nbcnews.com/id/51944150/ns/technology_and_science-space/t/nasas-curio...








