On the brink: Polar bears tip-toe on edge of a melting Arctic iceberg

Standing on top of the world: Polar bears tread carefully on an Arctic iceberg cliff in photographer’s stunning gallery of wildlife images Poignant photo shows two polar bears dice with death in their dwindling natural habitat as ice caps melt  Endangered bears – a mother and her young cub – are just feet from a huge fissure as they tip-toe over […]

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