Evolution is the complexity of processes by which living organisms established on earth and have been expanded and modified through theorized changes in form and function. Human evolution is the biological and cultural development of the species Homo sapiens sapiens, or human beings. Humans evolved from apes because of their similarities. This can be shown in the evidence that humans had a decrease in the size of the face and teeth that evolved. Early humans are classified in ten different types of families.
Indirect evidence suggests that it was possibly bipedal, and that some individuals were about 4'0 tall. The teeth appear to be more apelike than any other hominid. Another fossil is the Australopithecus africanus which was found by Dr. Raymond Dart in 1925 in a limestone quarry in South Africa. Brain size ranged between 420 and 500 cc. Although the teeth and jaws of africanus are much larger than those of humans, they are far more similar to human teeth than to ape teeth.
From Apes to Humans? Not Likely The claim being addressed is, “If we descended from apes, why are there still apes around?” Enough has been learned this year in order to refute this claim. “Archeologists estimate that modern humans have been on the Earth for about 200,000 years.” So if we came from apes, why are we coexisting today? Talk Origins likens this question to “if Americans and Australians descended from Europeans, why are there still Europeans around?” We did not simply start out as apes and then evolve into humans. But what apes and humans do have in common, is a common ancestor.
Origins of Early Hominins Humans know or understand the theory of evolution and how they evolved from apes, but there is always talk of a missing link between apes and modern humans. Apes did not just suddenly evolve into modern day humans. Apes evolved into another species that fall into the relation of modern humans. This is what the missing link is referring to; we call the species hominins. Hominins comprised of many species actually, including but not limited to, Australopithecus afarensis and Homo erectus.
The species here are listed roughly in order of appearance in the fossil record (note that this ordering is not meant to represent an evolutionary sequence), except that the robust australopithecines are kept together. Ardipithecus ramidus It is the oldest known hominid species, found in the Middle Awash region of Ethiopia in 1994 by Tim White and dated at 4.4 million years. Most remains are skull fragments. Indirect evidence suggests that it was possibly bipedal, and that some individuals were about 122 cm (4'0") tall. The teeth are intermediate between those of earlier apes and A. afarensis, but one baby tooth is very primitive, resembling a chimpanzee tooth more than any other known hominid tooth.
The fossils are dated between 154,000 and 160,000 years ago.i The fossils were dated radioisotopically.ii Since the fossils are the oldest known fossils of modern people, it is probable that these hominids represent the immediate ancestors of humans that are anatomically modern. Tim D. White’s (et al) article “Pleistocene Homo sapiens from Middle Awash, Ethiopia” describes the discovery of the Herto fossils and the research of the artifacts in great detail. The new discoveries raise many questions about the origin of modern man. Tim D. White, the project’s director claims that the Herto fossils prove that... ... middle of paper ... ...ww.nature.com/cgi-taf/DynaPage.taf?file=/nature/journal/v423/n6941/ful/nature01670_fs.html vii White, T.D. et al.
It is clear that the evolutionary tree is far bushier that at first appeared. While the human lineage split from that of the African apes some 5-10 million years ago, this new evidence suggests possible new lines from which humans evolved. It shows a far greater diversification of human evolution prior to the emergence of the Homo genus. The newly discovered skull has a small ear hole, like those of chimpanzees. However, it shares other features of early hominids, such as a small brain.
They are generally larger, more intelligent, and have more highly developed eyes than the prosimians. There are two distinct infraorders of Anthropoidea that have been evolving independent of each other for at least 30,000,000 years. They are the Platyrrhini (New World monkeys) and the Catarrhini (Old World monkeys, apes, and humans). These two diverse groups of species can be distinguished from each other most easily based on the form of their noses and by the number of specific types of teeth. The platyrrhine nose (on the left below) is relatively flat with somewhat sideways projecting nostrils separated by a wide septum.
Are we still evolving? How do humans and apes share a common ancestor? Modern human species or Homo sapiens have shown great similarities in the physical and genetic makeup to another group primates species, the apes. Both organisms share a common ancestor dating back eight to six million years ago. Evolution means change over time.
They had very small skulls compared to Homo Sapiens today and their motor skills were just the same. We have evolved and changed for the better both mentally and physically. The Evolution of Homo Sapiens started off simple, such as the Neanderthals, and now we are the most advanced species to ever walk the planet so far. The first group of primates was the Ardipithecus group. They were the earliest humans closely related to other primates.