Scientists have been debating whether dinosaurs were warm-blooded and which ones might have been. Researchers have now utilized chemistry to gauge the body temperature of two T. rex specimens. Aradhna Tripati, a professor and geochemist at the University of California, Los Angeles, admitted the challenges in this process. The study, recently published in Science Advances, detailed the innovative technique used to analyze the T. rex temperatures without direct physical measurement due to their extinction millions of years ago.
The method involved examining the chemical composition of tooth enamel and eggshells, which retain temperature-related signals. By studying the isotopic composition of bioapatite minerals in these tissues, researchers could estimate the body temperature of extinct species like dinosaurs. Previous studies on titanosaurs and oviraptors confirmed warm-blooded characteristics in some dinosaurs, while analyzing teeth from plant-eating dinosaurs like brachiosaurs hinted at their body temperatures.
In the recent study, scientists successfully estimated the body temperature of a T. rex named Thomas by analyzing tooth enamel samples. The results indicated a body temperature range of approximately 33.8 C to 38.8 C, akin to large mammals and certain bird species. These findings suggest that T. rex could have roamed diverse habitats, including the Arctic, owing to its warm-blooded nature.
The research has implications for understanding dinosaur behaviors and adaptations to different environments. Paleontologists, like Anthony Fiorillo, have welcomed these findings, emphasizing the insights they provide into ancient creatures’ physiological capabilities. The study sheds light on the potential mobility and survival strategies of tyrannosaurs like T. rex across various climates, including the far north.