Researchers at Caltech say they have taken the first direct temperature measurement of dinosaurs - and a possible step toward disrupting prevailing knowledge in one of paleontology's biggest debates.
For the last three decades or so, most scientists have accepted the hypothesis that dinosaurs were warm blooded - closer in body temperature and metabolic function to modern-day mammals and birds than reptiles.
In a study of isotopic concentrations in dinosaur teeth published today in "Science," Caltech professor John Eiler and his team report temperature readings similar to those of modern mammals and birds - but also suggest a more complicated view of the theory that dinosaurs had a warm-blooded metabolism.
"There are good reasons for the current point of view... but it might be that truth is something quite different," Eiler said.
In a technique he likens to "sticking a thermometer in a creature that's been extinct for 150 million years," Eiler and his team analyzed several teeth from sauropods - believed to be the biggest terrestrial animals to ever inhabit the earth - from sites in the U.S. and Africa.
What they found were high temperatures - but not as high as projected.
"We've provided a number that sounds warm, but you have to consider their tremendous size," Eiler said.
For more information related to dinosaurs, visit rareresource.com.
Caltech researchers get dinosaur body temperatures for first time
Posted by Dinosaurs World at 11:26 PMThursday, June 23, 2011
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