These conglomerate rocks on Mars could only have been formed by water. (NASA/JPL-Caltech/MSSS)
The rover found rocks that could only have been formed by water currents.
Curiosity landed on Mars on Aug. 5. (Los Alamos National Laboratory/Creative Commons)
One image shows Curiosity dangling from a parachute before touchdown.
The rover is scheduled to land on Mars Sunday night.
Astronaut Leland Melvin, will.i.am and NASA's Lori Garver (photo courtesy of Creative Commons).
The musician launched an initiative to encourage children to study sciences