A reconstruction shows the bones that have been found of the
Aardonyx skeleton. (Illustration by Adam Yates)  Before the dig
started, it looked like any other patch of dinosaur dirt: gray
soil, a few brownish fossilized bones exposed by erosion.
Paleontologist Adam Yates thought his diggers would find a few
bones from the massospondylus -- South Africa's most common
dinosaur.  So the Australian paleontologist at the University of
the Witwatersrand in Johannesburg initially assigned a master's
student in 2006 to excavate the site and research the story of
how the dinosaurs died.  But within days, it was clear that they
were on to something big. In about 11 weeks spread over the
years since, Yates' team members excavated about 300 bones from
a site just over 20 feet long and 9 feet wide.  They discovered
three new dinosaurs and the fangs of a mysterious dinosaur
eater, a likely fourth new species. The first to be named and
researched is Aardonyx celestae. The rest are still under study.
What makes A. celestae