The shrinking evolution that turned T. Rex to Tweety | Bangkok Post: news

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The shrinking evolution that turned T. Rex to Tweety

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WASHINGTON - Large, meat-eating dinosaurs shrank over a period of 50 million years of evolution to become today's modern birds, a study showed Thursday. 

Fossilized bones of a gigantic theropod dinosaur, Gigantorraptor erlianensis, are displayed on June 13, 2007 in Beijing

"Birds out-shrank and out-evolved their dinosaurian ancestors, surviving where their larger, less evolvable relatives could not," said lead author Michael Lee, a professor at the University of Adelaide's School of Earth and Environmental Sciences.

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