Lecture the miocene, missing link period, bipedalism. Paleoanthropology- study of human history and prehistory. Lumpers look for commonalities between fossils (ie; comparing similarities of ulna bones) to categorize them into species. Use info of fossils they have to determine the species of new fossils by looking at similarities. Splitters look for differences between fossils (what is the difference between the ulna o bones) o . Use of fossils they have to determine the species of new fossils by looking at the differences. Time period that existed between 23-5 mya. This period is when we first start to see fossils of apes. The fossils found with no tails indicated ape. More competition for food, less fruit due to the different trees. If earth did not cool down during this time humans would not have evolved. The period of time between 7-5 mya when we last shared a common ancestor with chimps.