At that time, known as the Devonian period, the world was changing dramatically ... The transition from these lobe-fins to the earliest tetrapods -- four-legged animals that walked on land ...

We have arrived in the Devonian period, some 420 to 360 million years ... Because all later land vertebrates, or tetrapods, can be traced back to a fish. This encompasses not only amphibians ...

Trees as we know them today, however, only appeared in the late Devonian Period, roughly 350 million ... The Origin and Evolution of Tetrapods.” Sharks also benefitted from their simple yet ...

David Broussard, Ph.D., department chair and assistant professor of biology, focuses his research on the paleontology of Late Devonian (365 – 360 million years ago) vertebrates including extinct ...