No Wheel, No Rover

Curiosity Wheel Damage article from space.com.

This article from space.com discusses the damage to Curiosity’s wheels.  Curiosity is a robotic rover on the planet Mars.  The rover team here on Earth has had to learn to drive carefully on Mars to protect the wheels the same way trail riders choose their path to protect their horse’s hooves.

You can see some of the holes in this picture:

You  can see the tracks left by Curiosity in this picture.  Notice how the rover is driving on soft dirt rather than through the rocks.