When it comes to global warming, it's easy to assume that the greatest impact is on our coldest climates, where we can see the polar ice caps melting before our eyes. But research coming out of Wake Forest University and elsewhere is establishing that the impact of rising temperatures could be even more dramatic in warmer climates, like the tropical forests that ring the center of the Earth. WFDD contributor Justin Catanoso recently spent more than two weeks with tropical biologists hiking through the jungles and rain forests of southern Peru. To listen to the full interview, visit WFDD's website.