You’ve probably heard of robots. But, have you heard of musclebots? Scientists at UCLA have made miniature walking machines out of rat heart muscles. Each time the muscle contracts and relaxes, the musclebot takes a step. To make this tiny muscle machines, scientists grow a thin film of heart muscle right on the nanobot using nanotechnology fabrication techniques. In the future, these musclebots could be used to deliver drugs or building other tuny machines.

Micro Musclebot: Wee walker moves by heart cells’ beats