National Geographic : 1996 Jun
Braced on a sandstone cliff, the author un covers teeth of Car charodontosaurus. At five feet four inches, the skull measures a few inches longer than that of the largest Tyrannosaurus rex, putting Carcharo dontosaurus in conten tion for the title of king of all land predators. Once it has been cleaned, a five-inch tooth (left) reveals a series of grooves Africa's DinosaurCastaways their purpose unknown. The team scaled crumbling slopes in 120°F heat on the 1995 expedition to the site in the Kem Kem region of Morocco. Fieldwork in Niger two years earlier covered flatter terrain. To get to the Niger dig, the crew drove from Algiers more than 1,500 miles into the Sahara (map) to pros pect among some of the world's least explored rock formations.