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NASA's Mars Reconnaissance Orbiter has captured images of kidney bean-shaped frozen sand dunes in Mars' northern hemisphere, revealing layers of carbon dioxide frost. These formations provide ...

Artist impression of NASA's Mars Global Surveyor's Mars Orbiter spacecraft. (NASA via SWNS) By Dean Murray Social media users are swooning over images of heart shapes found on Mars. The series of ...

This view of Mars' Valles Marineris hemisphere from July 9, 2013, is a mosaic of 102 Viking Orbiter images. At the centre is the Valles Marineris canyon, over 2,000 km long and up to 8 km deep. This ...