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.
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.
There is a lot of controversy over whether or not they actually interbred. Morphological features of present-day humans and anatomically modern human’s fossils have been the evidence that is for and against a genetic exchange between Neanderthals and the ancestors of present-day humans. DNA sequence data from present-day humans is also evidence that Neanderthals have made a genetic contribution to present-day humans (Green 1). Detecting signals of gene flow between Neanderthals and modern human ancestors can be challenging because the two groups share a common ancestor within the last 500,000 years. This is not any more concrete than the nuclear DNA sequence variation of present-day humans.
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.
Without evolution, and the constant ever changing environment, the complexity of living organisms would not be as it is. Evolution is defined as a process that results in heritable changes in a population spread over many generations (8).Scientists believe in the theory of evolution. This belief is based on scientific evidence that corroborates the theory of evolution. In Figure 1 the pictures of the skulls depict the sequence of the evolution of Homo-sapiens. As the figure shows, man has evolved from our common ancestor that is shared by homo-sapiens.
Lastly, scientists have recorded genetic changes in a certain species over many generations which support Darwin’s Theory. Those changes indicate that evolution is occurring. For all those reasons, Darwin’s Theory of Evolution makes scientific sense and should be respected. First off, there are many anatomical similarities between completely different species of organisms. One of the more well known similarities is that between apes and humans.
In light of the genetic revolution in biology, scientists can now identify neanderthal ancestry within the human genome. Utilizing the tools and techniques in the “Neanderthal Ancestry Estimator”, the company 23andMe recorded 1-4% of modern humans are of neanderthal descent in 2012. This modern evidence leads to some ancient debates regarding what happened when neanderthals and early humans coexisted some 45,000 years ago. There are several hypotheses under scrutiny including the idea that Homo sapiens outcompeted they’re neanderthalian relatives or that they coexisted, Homo neanderthalensis becoming absorbed into Homo sapiens over a short interbreeding-intense period or over a longer time period with intermittent admixture. Considering neanderthals differed from humans by only 0.12%, it’s not an unlikely hypothesis that the two species might find true love within one another and spawn hybrids that became the ancestors of modern Europeans and Asians.
Dramatic progress came with the evolution of Homo erectus, who exhibited more "human" morphology and life ways. Thus, behavioral, fossil and artifact data couple to give us a glimpse into our evolutionary past. The molecular clock is a method which determines how long ago a certain ancestor diverged into a new species. Up until the 1960's people believed that humans came into existence twenty million years ago, but Alan Wilson and Vincent Sarich came up with an idea to determine how closely related certain animals were and how much of their DNA was shared. They came up with something called DNA hybridization and mistakenly stumbled upon the molecular clock.
Ancestors. The Human Origins and Evolution. Prehistory in a logical and natural way, would begin with the appearance of the “Homo” and follows its evolution over millions of years until the creation of the state which is defined as an instrument of social organization. To understand the emergence and evolution of the human throughout prehistory, we should take a closer look at our ancestors, or better said to the presumed ancestors, while the reconstruction of their early emergence and evolution is full of mysteries and has still many unknown elements that are waiting to be discovered. Currently, the most well reasoned theory of evolution of modern humans - Homo Sapiens Sapiens – follows the hypothesis model of the recent single origin hypothesis
According to Relethford, Hominin is a tribe that comprises of humans and their closest ancestor. Hominin family has shown some resemblances with the evidences collected from fossil records as well as the evolutionary processes to the mordern humans. This article will try to describe the evolution of homonin tribe from the time period of Homo habilis to Mordern Homo sapiens. It will emphasis on the cranial capacity “skull proportions”, tools used and the cultural behavior. Homo habilis species was first found in East Africa at the Olduvai George site, approximately 1.9- 1.4 million years ago (Spoor et al.