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 ...

This tiny, solar-powered ... achieve new power efficiency. A paper describing it appears in the journal Nature today. You can also watch a video of it in action here. Why wings? Flapping wings ...