Having had billions of years to develop and refine its projects, nature is indeed the greatest designer of them all. Take for example, the hummingbird: capable of flying not only forward, but also backward and side to side, this bird's unique physiology also allows it to hover and navigate tight spaces with an impressive agility.Aiming to biomemetically translate some of these characteristics into a machine form, researchers from Purdue University's Bio-Robotics Lab have created a robotic version of this remarkable bird. This small…