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SAN FRANCISCO, May 11 (UPI) -- Stanford University scientists said they used an X-ray beam to confirm that Archaeopteryx, the "flying dinosaur," really had feathers.
The scientists in San Francisco identified key chemicals in the dinosaur's 150 million-year-old bones and wings, and in its soft tissue, the San Francisco Chronicle reported Tuesday.
The presence of the chemicals means the feathery impressions in the rock that fossilized Archaeopteryx actually were left by real feathers that had evolved for flight.