Humphrey on the Inside

This stereo scene from NASA's Mars Exploration Rover Opportunity shows "Spirit Mound" overlooking the floor of Endeavour Crater. The view appears three-dimensional when seen through blue-red glasse...

The color image on the left was taken by the panoramic camera onboard the Mars Exploration Rover Opportunity shows the part of the rock outcrop dubbed Stone Mountain at Meridiani Planum, Mars.

Born together, the Spirit and Opportunity twin rovers followed divergent paths after they landed on opposite sides of Mars. Opportunity’s journey was marked by good fortune, while Spirit’s was trou...

Rover 2 equipment deck, with solar arrays partially deployed, in JPL's Spacecraft Assembly Facility's cleanroom.

In this season 4 finale, Gentry Lee and Rob Manning reveal how surprises, hidden flaws, and uncertainties have always been a part of rovers and the exploration of Mars.

NASA's Mars Exploration Rover Opportunity observed this outcrop on the "Murray Ridge" portion of the rim of Endeavour Crater as the rover approached the 10th anniversary of its landing on Mars.

Spirit discovered this remarkable patch of bright, loose soil while driving toward "Home Plate" along the floor of the basin south of "Husband Hill" in Gusev Crater.

This panoramic image, dubbed "Rub al Khali," was taken by Opportunity on the plains of Meridiani during the rover's 456th to 464th sols on Mars.

Find out how the Mars Exploration Rover team traversed the Red Planet, examined the diverse environment and transformed our understanding of Mars.

A portion of an exposure of bedrock dubbed "Larry's Outcrop" shows little layering in this view, in contrast to nearby outcrops called "Methuselah" and "Jibsheet."

This full-circle, stereo panorama shows the terrain around the NASA Mars Exploration Rover Opportunity during the 3,105th Martian day, or sol, of the rover's work on Mars (Oct. 18, 2012).

The designated landing site for the first Mars Exploration Rover mission is Gusev Crater, seen here in its geological context from NASA Viking images.

This image shows the Spirit rover's landing site, the Columbia Memorial Station, at Gusev Crater, Mars.

A forward-looking view of a portion of the "Columbia Hills" captured by Spirit shows the expansive hills ahead. It features "Husband Hill" to the left, "West Spur" in the center, and a talus (rock...

This full-circle panorama shows the terrain around the NASA Mars Exploration Rover Opportunity during the 3,105th Martian day, or sol, of the rover's work on Mars (Oct. 18, 2012).

Near the lower left corner of this view is the three-petal lander platform that NASA's Mars Exploration Rover Spirit drove off in January 2004.

This stunning image features the heat shield impact site of NASA's Mars Exploration Rover Opportunity.

This series of images, taken by the Opportunity rover in July 2007, shows a darkening sky as a huge regional dust storm covered both Opportunity and her twin rover, Spirit.

Opportunity found an iron meteorite on Mars, the first meteorite of any type ever identified on another planet.

Download a PDF of the 2013 - 2014 Mars Calendar.

In late November 2005 while descending "Husband Hill," Spirit took the most detailed panorama so far of the "Inner Basin," one of the rover's target destination.

This stereo view was assembled from images taken by the navigation camera on NASA's Mars Exploration Rover Spirit during the rover's 337th martian day, or sol (Dec. 14, 2004). Spirit's position, ca...

This is a look inside a soil trench or drift dubbed 'Serpent' after the rover successfully dug into the side of the drift.

This image is an edited version of the last 360-degree panorama taken by the Opportunity rover's Pancam from May 13 through June 10, 2018. The version of the scene is presented in approximate true ...

This image shows the location of the rover-containing section of new color image in relation to Solander Point.