Climate Change, Research | featured news

Emissions continue to grow so rapidly that an international goal of limiting the warming of the planet to 3.6 degrees is on the verge of becoming unattainable, researchers said.

Polar bears first appeared 4-5 million years ago - but the animals have interbred with brown bears as Earth has warmed and cooled, say Penn State researchers.

Coral reefs along Panama's Pacific coast completely collapsed for 2,500 years due to natural climate cycles, researchers reported in a study Thursday, adding that there's a lesson in the data for man-made climate change: ease up on greenhouse gasses and reefs will restore themselves.