A Clock in the Rock
Found in the Dust

It is a warm afternoon in the Mount Blanco region of the Texas panhandle. The paleontologist gently wipes the dust off the cracked and splintered fossil trapped in the hardened dirt. She holds the tiny magnifying lens to the fossil and peers down at what look like teeth. This jaw is not like anything we know today. The teeth are large, jagged, and sharp. They appear to be for suited more for crushing than tearing.

With a smile the paleontologist sits back on her heels and calls to her excavation team "Well folks, here's a Borophagus bone crusher--we're in the Blancan now for sure. ."

Borophagus? Bone crusher? Blancan? What or where or who is that?