EMERGENCE OF BIRDS. “Maximum wing length closely tracked atmospheric pO2 before 140 Ma, but became decoupled from pO2 trends and is better explained by a model of stasis after 130 Ma. The timing of the oxygen-size decoupling coincides with the Early Cretaceous diversification of birds, between their first appearance in the latest Jurassic (Archaeopteryx, ca. 150 Ma) and the presence of diverse assemblages 25 Myr later.”
https://lnkd.in/dEANyiE
linkedin post 2022-06-29 05:12:48
Nigel Fleming
September 21, 2022