The original hook-and-loop fastener was conceived in 1941 by Swiss engineer George de Mestral.The idea came to him one day after returning from a hunting trip with his dog in the Alps. He took a close look at the burs (seeds) of burdock that kept sticking to his clothes and his dog's fur. He examined them under a microscope, and noted their hundreds of "hooks" that caught on anything with a loop, such as clothing, animal fur, or hair. He saw the possibility of binding two materials reversibly in a simple fashion if he could figure out how to duplicate the hooks and loops. Hook-and-loop is viewed by some like Steven Vogel or Werner Nachtigall as a key example of inspiration from nature or the copying of nature's mechanisms (called bionicsor biomimesis).