Right now, a spacecraft containing Curiosity — a car-size, nuclear-powered planet rover — is coasting at 8,000 miles per hour toward Mars, nearing the end of a journey that began in November. With tightening budgets, it is the last big hurrah for NASA’s planetary program for quite a few years. Packed with ingenious new instruments, the rover promises to provide the best-ever examination of the Red Planet, digging up clues to a profound question: Could there ever have been life there?

This is going to be an exciting ride. To read more, click here.