Complex sentence: Paleoanthropology combines the disciplines of paleontology and physical anthropology, it is the study of ancient humans as found in fossil hominid evidence such as petrifacted bones and footprints.
Split into simpler sentences: Paleoanthropology combines the disciplines of paleontology and physical anthropology. It is the study of ancient humans, as found in fossil hominid evidence such as petrifacted bones and footprints.