What a 99-million-year-old feather is telling us about the evolution of flight
Long before birds took to the skies, dinosaurs were already sporting feathers. But exactly how they evolved into the sophisticated structures that allow birds t…
Long before birds took to the skies, dinosaurs were already sporting feathers. But exactly how they evolved into the sophisticated structures that allow birds to fly remains something of a mystery. Now, the discovery of the longest feather ever found preserved in amber is providing some new clues.
原文出处：Phys.org （本文由聚合程序自动采集，版权归原作者所有）