Dinosaurs were warm-blooded, new study says

Were dinosaurs “warm-blooded” like present-day mammals and birds, or “cold-blooded” like present day lizards? The implications of this simple-sounding question go beyond deciding whether or not you’d snuggle up to a dinosaur on a cold winter’s evening. In a study published this week in the journal PLoS ONE, a team of researchers, including Herman Pontzer, Ph.D., assistant professor of anthropology in Arts & Sciences at Washington University in St. Louis, has found strong evidence that many dinosaur species were probably warm-blooded.

Study: Long legs are more efficient

Scientists have known for years that the energy cost of walking and running is related primarily to the work done by muscles to lift and move the limbs. But how much energy does it actually take to get around? Does having longer legs really make a difference? Herman Pontzer, Ph.D., assistant professor of physical anthropology in Arts & Sciences, has developed a mathematical model for calculating energy costs for two and four-legged animals. His research was published in a recent issue of The Journal of Experimental Biology.