This was published September 30 in Science.
http://www.sciencemag.org/cgi/content/abstract/science.1193604v1?sa_campaign=Email/pap/30-September-2010/10.1126/science.1193604
The paper describes a new Eocene fossil penguin with preserved feathers and shows that the morphology and color of the feathers were not similar to what we see in modern penguins. This is one of a few papers that have determined fossil feather color using melanosomes.
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