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Showing posts with label lift. Show all posts
Showing posts with label lift. Show all posts
Ostriches Use Wings to Run
The mystery of why dinosaurs evolved feathers has been solved. Observation of ostriches shows that wings are used to retain balance while running. Far from being evolutionary leftovers, they are used constantly.
This finding was made by breeding ostriches that were "human-friendly". Then they were then able to be tested, which took place when they were three years old. The ostriches were made to run down a 300 meter "track", indoors. They were seen to zigzag, brake and turn, guiding their bodies using wings as rudders.
Tests showed that feathers provided lift which improved stability. All living flightless birds are able to evade capture by quickly turning one way then the other. Without wings they would not be able to do this.
This finding was made by breeding ostriches that were "human-friendly". Then they were then able to be tested, which took place when they were three years old. The ostriches were made to run down a 300 meter "track", indoors. They were seen to zigzag, brake and turn, guiding their bodies using wings as rudders.
Tests showed that feathers provided lift which improved stability. All living flightless birds are able to evade capture by quickly turning one way then the other. Without wings they would not be able to do this.
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