The Mars Rover ‘Opportunity’ Beamed Back a New Look at the Red Planet

With all the buzz the SUV-sized Curiosity rover has generated since it landed on Mars in 2012, it's easy to forget that the rover has a little sister, named Opportunity. The smaller, golf-cart size rover has been exploring the Martian rilles and plains since January of 2004, and rarely gets much of a rest. Even when it does, it makes good use of its downtime.