http://www.sciencedaily.com

Smashing mantis shrimp. Snapping trap-jaw ants. Stinging jellyfish. Some of the fastest living things -- at least over short distances -- are also the smallest. A new mathematical model explores how the smallest and speediest things on Earth generate their powerful jumps, snaps, strikes and punches. The model could help explain why robots can't hold a candle to the fastest-moving insects and other tiny-but-powerful creatures, and how they could get closer.

An innovative, eel-like robot developed by engineers and marine biologists can swim silently in salt water without an electric motor. Instead, the robot uses artificial muscles filled with water to propel itself. The foot-long robot, which is connected to an electronics board that remains on the surface, is also virtually transparent.