Humans don't have hollow bones like birds do, so how big would our wings have to be to lift us off the ground?

Meet the Daredevil Inventors Helping Humans Fly Whether self-powered aircraft, wingsuits, jet packs or something even more astounding, the sky is most definitely not the limit.

If fruit fly wings do not develop into the right shape, the flies will die. Researchers have learned how fly embryo cells develop as they need to, opening a window into human development and ...