Talpids, which include small, burrowing moles, shrew-moles, and semi-aquatic desmans, are not well known from the fossil record, probably because of their small size and cryptic lifestyles. This tiny fossil jaw belongs to an ancient mole coined Oreotalpa; it was about the size of a mouse and lived in Colorado some 34 million years ago during the late Eocene Epoch. Although it may sound yummy (like Oreo cookies!), Oreo actually means 'mountain' in Greek, and Oreotalpa (or 'mountain mole') was named in honor of Colorado's Rocky Mountains where it was discovered. Judging by its teeth, Oreotalpa probably ate insects, like its living cousins do.