biomimicry:

wikipedia:

Biomimicry (from bios, meaning life, and mimesis, meaning to imitate) is a relatively new science that studies nature, its models, systems, processes and elements and then imitates or takes creative inspiration from them to solve human problems sustainably.

In her 1997 book, "Biomimicry: Innovation Inspired by Nature" (ISBN 0-06-053322-6), author Janine M. Benyus introduces biomimicry, presents examples, and explains why the field is important now. She writes, "Our planet-mates (plants, animals and microbes) have been patiently perfecting their wares for more than 3.8 billion years ... turning rock and sea into a life-friendly home. What better models could there be?"

The book lists numerous examples of people who are studying nature's achievements, including photosynthesis, natural selection, and self-sustaining ecosystems, among others. Benyus then explains how those researchers use the inspirations found in nature to emulate "life's genius" for the purpose of improving manufacturing processes, creating new medicines, changing the way people grow food, or harnessing energy.

Here are a few cool videos from TED:




http://www.ted.com/index.php/talks/robert_full_on_engineering_and_evolution.html
http://www.ted.com/index.php/talks/theo_jansen_creates_new_creatures.html