The Mars rover Opportunity has put itself into a type of standby mode, and NASA managers are waiting for it to resume normal behavior. The rover may have sensed something amiss while it was waiting out the solar conjunction between Mars and Earth.
While the rest of us enjoyed an extra hour of sleep as daylight saving time ended Sunday, the scientists and engineers working with the Mars rover Curiosity were just glad to be back on Earth time. The rover team has finally stopped working on Mars time, just as they planned.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.