How analyzing ancient and modern polar bear samples reveals the full scope of global warming

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How analyzing ancient and modern polar bear samples reveals the full scope of global warming
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The global climate is changing and the Arctic is warming rapidly. These are objectively true statements that most people have come to accept.

In our study we examined stable carbon and nitrogen isotopes in polar bear bone collagen.

The span of time captured by the archaeological samples was vast, but by dividing them into time bins associated with thewe were able to compare the samples across time before present : pre-Dorset , Dorset and Thule .

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