59,000-year-old Neanderthal tooth shows earliest evidence of dentistry - CNN

For more than a century, scientists have tried to reconstruct the biology of Tyrannosaurus rex from bones, teeth, footprints, and other traces left behind more than 60 million years ago. Fossils discovered as far north as Alaska have suggested that T. rex could tolerate cold conditions, adding to evidence that the giant dinosaur was moving away from the cold-blooded physiology of many reptiles and toward the warm-blooded metabolism seen in birds. Now scientists have done something that once seemed impossible: they have effectively taken T. rex's temperature.