In Morocco, there are spiders that know how to do cartwheels. They can cartwheel down sand dunes, and also up sand dunes, which is more than a little bit remarkable. The scientist who found them made a robot that does the same sort of thing.
They named it Tabbot which comes from tabacha, the word for spider in the language spoken by the local. Scientists suggest that the robot "may be employed in agriculture, on the ocean floor, or even on Mars."
Robots that roll and tumble definitely have a lot of potential when it comes to negotiating rough terrain, like sand, rocks, or even wet and slippery surfaces. These robots use large portions of their bodies to come into direct contact with the ground, which often allows for better weight distribution and traction than legs or wheels.