HONG KONG -- Tiny solar panels featured strongly among eco-friendly toys at this year's Hong Kong Toy Fair.

The achieved highest frequency of flapping-wing motion is 4.49 Hz, which exceeds the frequency of real butterfly wings, thus informing the further development of sunlight-driven bionic flying ...

A team of researchers have created tiny solar powered wings that can flap faster than butterfly wings and only need sunlight as a power source.

The butterfly, a cabbage white, (His honest idiocy of flight) Will never now, it is too late, Master the art of flying straight . . . – Robert Graves, Flying Crooked After the spring’s ...