“We are wheels down on Mars” was the official word from mission control as NASA’s new Mars rover, Curiosity, reached the surface of its new home.
I'm safely on the surface of Mars. GALE CRATER I AM IN YOU!!!
— Curiosity Rover (@MarsCuriosity) August 6, 2012
Curiosity will drill, sample, and laser-shoot rocks on the Martian surface over the course of it's initial two years to figure out what minerals and elements they contain. In particular, it will search for organic carbon that could indicate fossilized life forms and also sniff the Martian atmosphere for gasses such as methane that could be a sign of present-day life.