Humans aren't the only ones who get stressed. Stress on polar bears from their melting environment is stunting their growth!
When scientists compared polar bear skulls from the early 20th century to recent ones, they found they are getting smaller (meaning the bodies they were attached to are getting smaller as well). This correlates with global warming stress on the polar bear environment.
BBC News, Victoria Gill quotes biologist Cino Pertoldi as saying this is "because the ice is melting, the bears have to use much more energy to hunt their prey."
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