Bears look like textbook mammals, but hidden in their evolutionary history are two dramatic departures from the standard blueprint of growth and adaptation. For the first time, scientists have ...

Today, polar bears live only on the northernmost stretches of ice and snow, but their roots may lie farther south -- in an area that is now Ireland. Subscribe to read this story ad-free Get unlimited ...

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Polar bears are running out of ice and out of time, yet inside their cells something remarkable is happening. As the Arctic warms and traditional hunting grounds vanish, researchers are finding that ...