August 18, 2014
New Delhi, July 31: Only small and agile dinosaurs that evolved to climb trees, glide, and fly were the ancestors of birds, according to a study that corroborates an idea proposed by an Indian-origin paleontologist nearly 40 years ago.
...
Their study corroborates a model of dinosaur-to-bird evolution suggested by an Indian-origin paleontologist Sankar Chatterjee at the Texas Tech University in his 1977 book The Rise of Birds where he had argued that small size was critical for flight.