IPCC The Intergovernmental Panel on Climate Change Report

Mounting evidence and fulfilled predictions back up climate change theory.

Global warming may superheat summers in the eastern United States, NASA says.

Eruptions that sundered Greenland from western Europe set off intense global warming 55 million years ago.

Competing theories suggest day could get shorter or longer.

Scientists have been wagering privately for years, now the public can bet on climate change effects. The odds, however, are not in your favor.

New York City produces nearly 1 percent of the nation's greenhouse gas emissions — an amount that puts it on par with Ireland or Portugal — according to a city study.

Storing carbon dioxide underground to reduce greenhouse gases may be a safer method than previously thought.

Later this week in Paris, climate scientists will issue a dire forecast for the planet that warns of slowly rising sea levels and higher temperatures. But that may be the sugarcoated version.