Perseverance takes a selfie with its helicopter companion Ingenuity in the background. NASA/JPL-Caltech/MSSS hide caption
Mars Exploration Rover Opportunity
An artist's concept shows a NASA Mars exploration rover on the surface of Mars. The twin rovers Spirit and Opportunity were launched in 2003 and arrived at sites on Mars in January 2004. NASA/JPL-Caltech hide caption
This composite image provided by NASA shows before-and-after images taken by the Opportunity rover on Mars of a patch of ground taken on Dec. 26, 2013, showing the "Pinnacle Island" rock. AP hide caption
A photo composed of nearly 900 images taken by the rover Curiosity shows a section of Gale Crater near the equator of Mars. The rovers are continuing to work through the U.S. government shutdown. NASA/AP hide caption
NASA's Mars Exploration Rover Opportunity took this panoramic view of the planet between Dec. 2011 and May. NASA hide caption