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The Lifestyles of the Fish and Famous -- on Extra Oxygen (9 of 14)

Caption: This shows the color of pig, cow and whale muscles. The oxygen-storing protein myoglobin gives meat its red color. Elite diving mammals contain such high concentrations of myoglobin that their muscles look almost black. This image relates to a paper that appeared in the June 14, 2013, issue of Science, published by AAAS. The paper, by Scott Mirceta at University of Liverpool in Liverpool, UK, and colleagues was titled, "Evolution of Mammalian Diving Capacity Traced by Myoglobin Net Surface Charge."

Credit: [Image courtesy of M. Berenbrink/S. Mirceta]

Usage Restrictions: Please cite the owner of the image when publishing. This image may be freely used by reporters as part of news coverage, with proper attribution. Non-reporters must contact Science for permission.

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