Video: Technology

3D study shows forelimb enlargement key to evolution of dinosaurs into birds (2:39) 

April 24 - British scientists say they have found new evolutionary evidence linking dinosaurs to birds. A series of 3D reconstructions illustrate what the scientists say is the gradual evolution of small forelimbs into wings which led two-legged dinosaurs to stand and move like birds. Jim Drury reports. ( Transcript )

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