As long as the sun shines, the wind will blow. And wind has long served as a power source to humans. Ancient mariners used sails to capture the wind. Farmers once used windmills to grind their ...

Wind Power Quiz, Part 1 You've seen those tall white turbines turning on hillsides or on windy plains, but how much do you know about the energy captured from wind? Save $5 on a Nat Geo Digital ...