Source: io9.com/how-did-feathers-evolve-504470082
Crédits: 2 mai 2013
View full lesson: http://ed.ted.com/lessons/how-did-fea...
To
look at the evolution of modern bird feathers, we must start a long
time ago, with the dinosaurs from whence they came. We see early
incarnations of feathers on dinosaur fossils, and remnants of dinosaurs
in a bird's wish bone. Carl Zimmer explores the stages of evolution and
how even the reasons for feathers have evolved over millions of years.
Lesson by Carl Zimmer, animation by Armella Leung.