Crocodile with impala (IMAGE)
Caption
A Nile crocodile swallows an impala, its reward for lying in wait beneath the water’s surface. By resurrecting the hemoglobin of ancient crocodilian ancestors, a Husker-led team has helped explain why other vertebrates failed to evolve the adaptations that allow crocs to go hours without air.
Credit
Cell Press / Current Biology / Shutterstock / Scott Schrage, University of Nebraska–Lincoln
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License
CC BY-NC-ND