what kinds of evidence from fossils might help determine whether dinosaurs were ectotherms or endotherms?

For this question, you should suggest some way of using fossil evidence to estimate a dinosaur’s mass and metabolic rate. These estimates can be compared with data from living animals.

Notes:

"Evidence such as rapidly growing bones, bird-like feathers and athletic builds have led most paleontologists to believe that dinosaurs were endothermic, says paleobiologist Greg Erickson of Florida State University in Tallahassee, Fla., who was not involved in the new research."

"Dinosaurs were once thought to be slow-growing ectotherms: lumbering animals with slow metabolisms similar to modern reptiles. But evidence from growth rings in fossil bones suggests that their growth rates were quite high and more closely matched those of endotherms."