The answer is blowing in the wind...and winding through our bodies...
Turns out the most efficient design for a wind turbine copies the structure of DNA. Several companies are now offering rooftop-mounted double helix wind turbines to generate electricity for the home and small business. The videos tell the story:
Also turns out that whale fins teach us how to construct a more efficient traditional turbine blade. Toronto-based Whale Power Corp. has started mimicking whale fins in the manufacture of their bumpy-edged fan and turbine blades after US scientists discovered that tubercles -- the little bumps on humpback fins -- result in 32 percent less drag and an 8 percent rise in lift when compared to a smooth fin.








![Planet Earth - The Complete BBC Series [HD DVD]](http://ec1.images-amazon.com/images/I/11UFAyLAjJL.jpg)





Reader Comments