Chinese Mars rover likely lost to Martian dust.

China's Zhurong Mars rover has not woken up due to a higher-than-expected amount of dust on its solar panels, according to the chief designer of China's Mars exploration program. The rover requires a temperature of greater than minus 15 degrees Celsius and energy generation of greater than 140 watts to resume activities. If dust levels on the panels were 30% greater than expected, then Zhurong would require the strongest sunlight levels on Mars to reactivate. A level of 40% or more above expected levels would mean the rover will not be able to wake up.