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8 wilderness icons under threat

By: chief on April 19, 2012, 2:35 p.m.
Humpback whale


8 of 10

Humpback whales

Humpback whales have declined because of a number of pressures, including commercial whaling, ship strikes and net entanglements. But the species has proven to be resilient, staging a comeback over the past few years with the help of anti-whaling laws.