Dear Reader, remember the remote-controlled Mars rovers, Spirit and Opportunity? How long is it since the last time you thought of them? Spirit landed on Mars seven Earth calendar years ago today, Opportunity on 25 January — and at least Oppy still works fine! Spirit has sadly been stuck on the edge of a small dust-filled crater since May 2009, one set of wheels inside and one outside the crater. It is currently incommunicado because of the Martian winter, being in a poor position for solar power. But it still probably works. And Oppy trundles on toward Endeavour crater. Currently it’s taking stereo images at the 80-metre diameter Santa Maria crater. Check out the project’s web site for news!