Killer whales migrate 5,000 miles in one month to shed skin

10/26/2011 | MSNBC

In order to shed their skin, and a yellow-tinged algal organism that grows on it in the frigid Antarctic waters, killer whales travel some 5,000 miles to the warmer waters of South America, according to researcher John Durban, of the National Oceanic and Atmospheric Administration. This marks the first time killer whale migrations have been observed.

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