Meet the 6-legged robot lizards that may one day roam Mars

Wheels are great for traversing flat, paved surfaces, but when the terrain is covered with loose sand and large rocks, it’s time to grow feet. Scientists built a six-legged robot after studying the movements of lizards, and the breakthrough may mean a fast walking rover we send to Mars that’ll leave its predecessors in the dust.

“Having appendages like legs or limbs can be useful and beneficial” when the ground gets less even and solid, Daniel Goldman, a physicist at the Georgia Institute of Technology, told NBC News.