Inspired by the elegant and highly efficient movement of a stingray, researchers have created a robotic equivalent made using cells from the heart of a rat that can be controlled by light.
Batoid fish, which include stingrays, are instantly recognisable by their flat bodies and long, wing-like fins extending from their heads.
These fins move in such a way to generate the most movement while using the least amount of energy possible.
These energy-efficient waves emulate from the front of the fin to the back, allowing batoids to glide gracefully through water.
Inspired by this design, Sung-Jin Park from Harvard University endeavoured to build a miniature, soft tissue robot with similar qualities and efficiency.
His team created 'charged' gold skeletons that mimic the stingray's shape.