New insights into the origin of birds

The key characteristics of birds which allow them to fly — their wings and their small size — arose much earlier than previously thought, according to new research from the Universities of Bristol and Sheffield into the Paraves, the first birds and their closest dinosaurian relatives which lived 160 to 120 million years ago.

Fuente : http://www.eurekalert.org/pub_releases/2014-02/uob…