HiRISE Mars camera observes hundreds of impacts each year

Scientists using images from NASA's Mars Reconnaissance Orbiter, or MRO, have estimated that the planet is bombarded by more than 200 small asteroids or bits of comets per year forming craters at least 12.8 feet (3.9 meters) across.

Plate tectonics observed on Mars

Mars may be experiencing plate tectonics - a phenomenon previously thought to be confined to Earth.

Martian sand dunes are still on the move

NASA's Mars Reconnaissance Orbiter (MRO) has revealed that  sand dunes on Mars can put on a surprising turn of speed.

Video: NASA spots a Martian dust devil

A Martian dust devil approximately 12 miles high (20 kilometers) was spotted whirling its way along the Amazonis Planitia region of Northern Mars just a few weeks ago.

NASA releases people's pick of Mars photos

NASA has released the first Mars pictures commissioned by the public - and there's not a thumbprint or double exposure among them.