Skycrapers of the future may shine in brilliant butterfly colors. Optical biosensors may be made from spider webs. These are just a few of the engineering marvels coming from biomimetics—the imitation of nature.
Global Positioning System (GPS): that's a function. Maintaining a suite of satellites is one method for achieving the function. But there are other ways to figure out where in the world you are, and two very different animals show the way – naturally – using Earth's global magnetic field.
While the largest of animals impress us with their size and bulk, some of the most amazing are those you could hold in the palm of your hand. Here are three worth appreciating a little more.