The bar-tailed Godwit holds the world record for how far a bird can fly without stopping to feed - one of the Australian birds flew to Alaska without stopping to feed, flying for an astonishing 7,256 miles.
So designer William Black took the bird's wings as his inspiration for a 'zero-emission' jet - the Lockheed Stratoliner concept - which would use bird-like wings for extended lift on high-altitude flights.
His idea was a jet that could fly anywhere on Earth - emitting no pollution whatsoever. The idea is still some way off, however. Hydrogen-powered flight has only been demonstrated a few times - and then only in small aircraft.
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