Physics:Flying Like A Bird
Is there a scientific reason why no one has ever managed to fly by flapping wings like a bird， or would it be possible with modern materials to make a passenger carrying， flapping flying machine? Welcome to Science Shack. And by the end of the program I want to be flying all around this hanger using flapping wings， just like this little chap.
- Added：2006
- Country：America
- Duration：30
- Time of update：2011/8/26 14:11:56