Science & Technology - Tuesday, May 25, 2010 10:31 - 0 Comments

Team takes temperature of extinct vertebrates

CALTECH (US)—Was Tyrannosaurus rex cold-blooded? Did birds regulate their body temperatures before or after they began to grow feathers? Through analysis of rare isotopes in the bones, teeth, and eggshells of large extinct vertebrates, a research team has taken a critical step toward answering such questions. Continue…