There have been four successful robotically operated Mars rovers, all managed by the Jet Propulsion Laboratory: Sojourner, Opportunity, Spirit and Curiosity. On January 24, 2016, NASA reported that current studies on Mars by Curiosity and Opportunity (the latter now defunct) would be searching for evidence of ancient life, including a biosphere based on autotrophic, chemotrophic or chemolithoautotrophic microorganisms, as well as ancient water, including fluvio-lacustrine environments (plains related to ancient rivers or lakes) that may have been habitable. The search for evidence of habitability, taphonomy (related to fossils), and organic carbon on Mars is now a primary NASA objective. In June 2018, Opportunity went out of contact after going into hibernation mode in a dust storm. NASA declared the end of the Opportunity mission on February 13, 2019, after numerous failures to wake up the rover.
Mars Rover Pictures nasa39s curiosity rover takes selfie in middle of dust Mars Rover Pictures .
Mars Rover Pictures a mars rover could discover life on the red planet here Mars Rover Pictures .
Mars Rover Pictures curiosity mars rover reaches 2000 sol milestone Mars Pictures Rover .
Mars Rover Pictures mars rover selfies turned into stunning self portrait Rover Pictures Mars .
Mars Rover Pictures the mars rover just sent back data that has scientists Rover Pictures Mars .
Mars Rover Pictures curiosity mars rover 39look ma no hands39 imageo Mars Pictures Rover .
Mars Rover Pictures rough red planet rocks rip rover curiosity wheels Rover Pictures Mars .
Mars Rover Pictures nasa39s curiosity mars rover finds a clay cache nasas Pictures Mars Rover .
Mars Rover Pictures the mars rover just sent back data that has scientists Mars Rover Pictures .
Mars Rover Pictures vista from mars rover looks back over journey so far Mars Rover Pictures .
Mars Rover Pictures mars rover curiosity views spectacular layered rock formations Pictures Rover Mars .
Mars Rover Pictures mars opportunity rover captures panorama above Mars Rover Pictures .
Mars Rover Pictures nasa opportunity mars rover officially dead the Mars Rover Pictures .
Mars Rover Pictures stunning new mars images from curiosity space earthsky Rover Mars Pictures .
Mars Rover Pictures mars rovers drill out of action astronomy now Rover Pictures Mars .
Mars Rover Pictures mars rover tests driving drilling and detecting life in Mars Rover Pictures .
Mars Rover Pictures nasa declares opportunity mars rover mission over Mars Pictures Rover .
Mars Rover Pictures mars honeybee robotics Pictures Rover Mars .
Mars Rover Pictures massive storm on mars downs nasa39s opportunity rover after Rover Mars Pictures .
Mars Rover Pictures mars rover resumes science mission after computer glitch Rover Mars Pictures .
Mars Rover Pictures stunning new images of mars from the curiosity rover Rover Mars Pictures .
Mars Rover Pictures mars exploration rover wikipedia Rover Mars Pictures .
Mars Rover Pictures mars rover sees signs of microbe friendly layers in Mars Pictures Rover .