> The six-wheeled, roughly 309-pound (140 kilograms) Yutu 2 has accumulated nearly 4,265 feet (1,300 meters) of driving in its roughly 3.5 years on the far side of the moon <

it's crazy how slow this thing moves. Is there any explanation for this speed - most energy efficient?

Can't vouch for them, but for some detailed general answers see https://robotics.stackexchange.com/questions/679/why-are-mar...

But even by extraterrestrial rover standards, Yutu 2 seems pretty slow. You might like this comparison of distances covered: https://mashable.com/article/moon-mars-rover-distance-driven

thanks!