Deleted
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Post by Deleted on Apr 26, 2009 22:58:53 GMT 1
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Post by liverpoolman1 on Apr 27, 2009 11:20:22 GMT 1
BBC recently showed a programme where the mystery of the silent flight of owls was explored. The secret is in the trailing feathers on their wings and aircraft companies are studying this phenomenon in a bid to reduce noise of aircraft around airports. Nature has much to teach us.
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