It wasn't that long ago that people were highly skeptical of the entire concept of human flight. A few crazy people dressed up in bird-inspired outfits with wings and tried to jump from various heights in order to fly or glide -- and they were generally met with mockery. Nowadays, we know just how hard it is to achieve human-powered flight
, but it has been achieved -- in several different ways. The Igor I. Sikorsky Human-Powered Helicopter Prize
was awarded in 2013, and the Kremer Prize
was won back in 1977. If you're not willing to work up a sweat, check out some of these aircraft.
After you've finished checking out those links, take a look at our Daily Deals
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