A NASA spacecraft plunged into the atmosphere of Mars and successfully landed in the Red Planet’s northern polar region on Sunday, where it will begin 90 days of digging in the permafrost to look for evidence of the building blocks of life. Cheers swept through mission control at NASA’s Jet Propulsion Laboratory when the touchdown signal from the Phoenix Mars Lander was detected after a nailbiting descent. Engineers and scientists hugged and high-fived one another