The six-wheel rover fired up its onboard laboratories and analyzed a pinch of rock dust over the weekend. It had been unable to perform science experiments since late last month after experiencing a computer memory problem.
Mission managers say Curiosity will work for a week before it takes another break. But this one is planned, because the sun will block communications between Earth and Mars.
Before the computer woes, Curiosity drilled into a rock, tested the powder and found it contained some of the chemical ingredients necessary for microbial life. There are plans to drill into another rock before setting off for a mountain later this year.