Fossil evidence for evolution of the shape and color of penguin feathers
J. A. Clarke,
D. T. Ksepka,
R. Salas-Gismondi,
A. J. Altamirano,
M. D. Shawkey,
L. D’Alba,
J. Vinther,
T. J. DeVries, and
P. Baby
2010
Article
Science
330:
Find it at:
http://dx.doi.org/10.1126/science.1193604