 The family took pictures and sent them to their dad's high school friend, Dr. Tyler Lyson, who works at the Denver Museum of Nature and Science. Dr. Lyson is a paleontologist. He organized an excavation to check out their discovery. And it wasn't long before he realized this was something very special and very rare. Teeth from a giant Tyrannosaurus rex. And now the scientists will study the bones to find out how old the T-Rex was before it died millions of years ago.