Lots of leapin' lizards living no longer; researchers say global warming threatens reptiles Sometimes it can be too darn hot even for a lizard. Cold-blooded creatures that have to soak up the rays to get going might seem like the last animals you would expect to be threatened by global warming. Well, you would be wrong, researchers say. It turns out lizards are going extinct in many places, and scientists who have studied them say it's because of rising temperatures. The heats affects reproduction. "The results were clear. These lizards need to bask in the sun to warm up, but...