David Dausey. David J. Dausey is an epidemiologist, professor and academic administrator. He is currently the Provost and Vice President for Academic Affairs at Mercyhurst University in Erie, Pennsylvania. He is also a Distinguished Service Professor of Health Policy and Management at Carnegie Mellon University in Pittsburgh, Pennsylvania.
First creature to walk on land 'dragged itself along' on two feet - like it was on crutches. One of the first creatures to walk on land didnât scamper gracefully out of the waves. Instead, the creature, known as Ichthyostega, would have hauled itself up on its front limbs like it was on crutches.
Spinosaurus aegyptiacus is the largest known land predator. It was a member of the theropod dinosaur family. It lived in what is now the Sahara desert 100 million years ago. Bâ¦eing so large Spinosaurus wouldn't have had any natural predators.