 
        
            Mammal
            Maotherium
            Mark Norell may not be wowed by this specimen, which he compares to
            "a flat rat on a New York street." But even this seasoned
            paleontologist agrees that the fossil's details are exceptional.
            Perhaps most striking is the aura-like fringe of fur surrounding the
            skeleton. Small mammals are as ancient as dinosaurs. In fact, until
            the demise of traditional (non-avian) dinosaurs at the end of the
            Cretaceous, most mammals remained small, hunting insects, scavenging
            nests, and living in the shadow of dominant reptiles.