NASA's HiRISE orbital camera captures enlightening close-up shots of Martian surface

Image credit: University of Arizona, NASA, JPL. Researchers at the University of Arizona have used NASA's High Resolution Imaging Experience (HiRISE) camera to capture images of the Valles Marineris canyon on Mars. Researchers want to study the canyon, which is 2,500 mi (4,000 km) long and has depths up to 4 mi (7 km), to better understand how it formed and what its formation means for the history of Mars itself. Valles Marineris is the largest known canyon in the solar system and it may hold th...