Polar bears again attracted to Russian town by dead walrus Attenborough blames on no sea ice

Lack of sea ice caused by human-caused global warming is not causing increasing numbers of polar bears to congregate around Ryrkaypiy in the late fall. A combination of increasing numbers of bears plus an abundance of walrus that have died of natural causes earlier in the year are almost certainly the proximate cause. Carcasses of walrus and dead whales are an attractive source of food for polar bears who must replenish fat they have lost over the summer before the cold and darkness of winter sets in.

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