FOXNews.com - Did Cold Weather Kill the Woolly Mammoth?

Mighty swings in climate played a major role in causing mass extinctions of mammals, such as woolly mammoths and saber-toothed cats, in the last 50,000 years, researchers now suggest.

A Different Angle on Climate-Change Economics - Freakonomics Blog - NYTimes.com

People who view climate change primarily as a moral issue, or even a political one, may be reluctant to acknowledge that there are already a lot of people — or at least a few really rich and powerful ones — who see it as a business opportunity.