Oil Spill to Wipe Out Gulf's Sperm Whales?

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Oil Spill to Wipe Out Gulf's Sperm Whales?
Photograph by Rachel Denny Clow, Corpus Christi Caller-Times/AP
By Ker Than, for National Geographic News
Published May 21, 2010

Just three dead whales could push the Gulf population over the edge, experts say.
If the Gulf of Mexico oil spill kills just three sperm whales, it could seriously endanger the long-term survival of the Gulf's native whale population, scientists say.

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