Are Dinosaurs Warm or Cold Blooded?

Researchers at the California Institute of Technology found a new way to determine if dinosaurs are warm or cold blooded. They look at waste products that form the amount of these waste molecules found in bones directly relates to the amount of oxygen taken in by the animal. The researchers studied the femurs of 55 different creatures, including 30 extinct and 25 modern animals. And guess what they found? Dinosaurs could actually sing.