Tyrannosaurus Rex Was A Chick: "A North Carolina State University team of Scientists led by Mary H. Schweitzer has been studying the fossilized bones of a Tyrannosaurus rex, which was found in Montana.
The team has found evidence that the T-Rex was not only a female, but an ancestor of birds as well. Medullary bone was found inside the leg bones of the creature. This is a layer of bone that forms in birds as they lay eggs. It aids the development of eggshells by supplying calcium. "
Of course, T-Rex probably never existed because Noah didn't manage to bring one along on the Ark (snark).