Curiosity switches to ‘Safe Mode’ reports that engineers have switched Mars rover Curiosity operations onto its backup computer, following a memory issue that was noticed when Curiosity had not sent recorded data back to Earth or switch into a daily sleep mode as it was expected to. It’s suspected that cosmic radiation may have damaged hardware on the “A-side”. The “B-side” will take over while engineers determine the best way to restore the A-side as the new backup. It amazes me the engineering that went into this project that allows for such plan B actions at a distance of 35 million miles.