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.
On TV. More About This episode. Hundreds of millions of years before mammals roamed the planet, a worm-like creature known as Myllokunmingia swam the Cambrian seas. Scientists believe it to be the word's first vertebrate and the forefather of many backboned creatures we see in every environment on the planet today. Join host David Attenborough as he explores the ancient origins of the very first vertebrates.