Since Darwin’s time, the feathered creature has been called the first bird, but a study of its 150-million-year-old fossils indicates it was far heavier and slower-maturing than modern birds.

Archaeopteryx, believed for 150 years to have been the first bird, was probably only a feathered dinosaur that had great difficulty getting off the ground when it lived 150 million years ago, researchers reported this week in the journal PLoS One.

L.A. Times - Technology News