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Polar bears Sheba, right, and her 13-year-old son Inuka, wander at their cage of Singapore Zoological Gardens in Singapore Monday, Feb. 23, 2004. The usually white coats of the two polar bears turned green a few weeks ago from algae growing in their hollow hair shafts. Sheba’s coat was successfully bleached with hydrogen peroxide 2 1/2 weeks ago and Inuka will be given a similar treatment in 3 weeks time. (AP Photo/The New Paper)
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