Bright blue marks a deposit of chloride (salt) minerals in the southern highlands of Mars in this false-color image, which highlights mineral composition differences.
This image provides higher-resolution views of a site where another observation indicates the presence of chloride salt deposits.
This image shows a possible cave skylight informally called "Annie," which has a diameter about double the length of a football field.
Seven very dark holes on the north slope of a Martian volcano have been proposed as possible cave skylights.
Color coding in this map of a far-northern site on Mars indicates the change in nighttime ground-surface temperature between summer and fall.
Dark spots and 'fans' appear to scribble dusty hieroglyphics on top of the Martian south polar cap.
As winter turns to spring at the south polar ice cap of Mars, the rising sun reveals dark spots and fans emerging from the cold polar night.