flies like a bird, but its power comes from the sun. Gupta and his team have been working on a “flapping-wing platform” since 2005, but they only recently added the solar cells, figuring that ...

But nobody has ever built a flying machine powered totally by solar energy, and pushed aloft by flapping its wings, so can these folks really do it? "I think so," says Kakkattukuzhy Isaac ...

That’s where solar ... power the water fountain after the sun goes down or on cloudy days. Birdbaths are a stand-alone way to attract birds to your yard, but they also make a great companion for ...