What we learned from dinosaur teeth in North Africa
(PHYSorg.com Archaeology & Fossils)

As dinosaurs go, Spinosaurus is one of the most recognizable: a predator with sharp claws, a long jaw full of teeth, and a big sail on its back. It lived near rivers, hunting for fish, 100 million years ago in a place that`s now desert; the Kem Kem beds, a geological formation in North Africa.