End of the MegafaunaThe fascinating lives and puzzling demise of some of the largest animals on earth. Until a few thousand years ago, creatures that could have been from a sci fi thrillerincluding gorilla sized lemurs, 800 pound birds, crocodiles that weighed a ton or moreroamed the earth. These great beasts, or "megafauna," lived on every habitable continent and on many islands. With a handful of exceptions, all are now gone. What caused the disappearance of these