Hovering drone inspired by swimming jellyfish
15 January 2014 Last updated at 06:39 GMT
Scientists have built what they say is the first flying machine that can hover in a stable manner by flapping its wings.
Previous designs for so-called flapping wing aircraft have mimicked the wing motions of insects, but the new design is based on the way jellyfish swim.
It was built by a team at New York University in America.
Footage courtesy of New York University