Today, saber-toothed animals include the walrus, musk deer and warthog, all of which grow incredibly long and sharp canines, the hallmark of a saber tooth. (Elephant tusks are long incisor teeth ...

But its fangs, Sereno argues, were more like those of the piglike peccary (picture) or fanged deer ... did with its sharp fangs, Sereno then reassembled P. africanus' jaw and teeth.