Hey, i am helping a friend do some research on Green Iguanas for a school project. I dont want to use google, or anything like that bc i dont want to get the wrong info. if any one on here could help out that would be great...

things i would like to know:
average life span
diet
heating/cooling
caging
lenght
size
some pictures that could be used too would be great, thanks again guys and gals.