The surface of Mars
The base of Mars' Mount Sharp. REUTERS/NASA
A view of Ophir Chasma on the northern portion of the vast Mars canyon system, Vallles Marineris, taken by NASmore
Nili Patera, one of the most active dune fields on the planet Mars. REUTERS/NASA/JPL-Caltech/Univ. of Arizonmore
Viscous, lobate flow features commonly found at the bases of slopes in the mid-latitudes of Mars, often associmore
Rough spherical features in an area called Yellowknife Bay. These features are interpreted as concretions, impmore
An impact crater on Mars is seen in an image taken by Orbiter. REUTERS/NASA/JPL-Caltech/Univ. of Arizona
A rock outcrop called Link pops out from a Martian surface. Rounded gravel fragments, or clasts, up to a couplmore
The northern-most sand dunes are seen as they begin to emerge from their winter cover of seasonal carbon dioximore
A location on Mars associated with the best-selling novel and Hollywood movie, "The Martian" This area is in tmore
Portions of the Martian surface showing many channels from 1 meter to 10 meters wide on a scarp in the Hellas more
A view of the Noctis Labyrinthus region of Mars, perched high on the Tharsis rise in the upper reaches of the more
The surface of the planet Mars inside Gale Crater. REUTERS/NASA
Curiosity appears as a bluish dot near the lower right corner of this enhanced-color view from Orbiter taken Jmore
Part of the wall of Gale Crater. Here, a network of valleys believed to have formed by water erosion enters Gamore
Inclined layering known as cross-bedding in an outcrop called Shaler on a scale of a few tenths of a meter. more
Two trenches dug by Phoenix's Robotic Arm. REUTERS/NASA/JPL-Caltech/University of Arizona
Mars' Victoria Crater at Meridiani Planum. REUTERS/NASA/JPL/Caltech
An iron meteorite on Mars in an image taken by the Mars Exploration Rover Opportunity. REUTERS/NASA/JPL/Cornmore
This image, cropped from a larger panoramic image mosaic taken by the Mars Exploration Rover Spirit panoramic more
The death toll from a fire which ripped through a Greek coastal town stood at 80 on Wednesday, with dozens of people unaccounted for.
Pakistanis vote in a knife-edge general election pitting cricket hero Imran Khan against the party of jailed ex-Prime Minister Nawaz Sharif.
Afghan Vice President Abdul Rashid Dostum narrowly escapes a suicide bomb attack at Kabul airport as he returned home from more than a year in exile.
Our top sports photography this week.