NASA's rover "Curiosity" touched down on Mars early Monday morning, marking a historic triumph for space exploration and engineering. After surviving a wildly complex landing process that uses something called a "sky crane" and a "solar parachute," the Curiosity touched down and began transmitting back images and data to scientists at NASA, while their engineers high-fived, hugged and wept. President Barack Obama congratulated NASA in a statement, saying "The successful landing of Curiosity—the most sophisticated roving laboratory ever to land on another planet—marks an unprecedented feat of technology that will stand as a point of national pride far into the future." Curiosity's first messages back to earth were pictures of it casting its own shadow on the Red Planet and, reportedly, a "We miss you!" from Lady Gaga's family ...