Human-powered helicopter takes flight
A team of engineers from Canada has won a $250,000 (£165,000; 192,000 euros) prize for making the first human-powered helicopter.
The contraption - called Atlas - reached an altitude of 3.3 metres for 64 seconds under pedal-power, meeting a challenge set by the American Helicopter Society 33 years ago.
Roopa Suchak reports.
- From the section US & Canada