The dinosaur, nicknamed "Apex" -- which lived ... particularly notable in the fusion of the 4 sacral vertebrae, would indicate that it lived to an advanced age," Sotheby's wrote on its website.

Charly TRIBALLEAU / AFP via Getty 4 Americans Charged with Selling $1M of Dinosaur Bones to China ... particularly notable in the fusion of the 4 sacral vertebrae, would indicate that it lived ...

Dinosaurs are one of the most successful groups of animals to have roamed the planet. For over 170 million years they dominated the land, from small creatures just a few feet long to some of the ...

Silesaurids and dinosaurs were both quadruped reptiles, but the silesaurids had traits like different cervical vertebrae. "Its incipient fourth trochanter of the femur and three sacral vertebrae ...