5 civilizations destroyed by climate change

Climate change may grab a lot of headlines these days, but changing global temperatures and weather is nothing new. In fact, people have been dealing with it for millennia. But our recent first-hand understanding has prompted researchers to take another look at some vanished civilizations to see what led to their downfall. Here are five that have been destroyed—or their decline drastically accelerated—by climate change. (Jackie Mead , more at mentalfloss.com)