Albert Perry Anatomic

For many years there has been a debate over where modern humans originated from. The first theory, out of Africa, discusses modern humans evolving in Africa. They migrated out to Eurasia and as the time went on their species evolved independently and developed into distinct species. All other human populations were eventually replaced with no interbreeding involved in the process and Homo sapiens had successfully dominated the rest of the world. On the other hand, the second theory, regional continuity, says that our earliest hominid ancestors had departed Africa and spread into other parts of the world later evolving into modern human beings. In this paper I will discuss the Regional continuity theory and elaborating on the Out of Africa theory. Evidence based on fossils, artifacts, and other crucial components will be discussed. Based on the evidence found I will come to a conclusion as to which theory I think best fits the origins of humans.

The Journey of Man was an interesting non-fictional anthropological literary piece where the author sought to explain how modern humans came to inhabit the world we know today. He began by talking about the mitochondrial DNA passed from mother to daughter, or the maternal line. Using this it was discovered that all people had a common female ancestor who lived in Africa about 200,000 years ago. This was one of the first steps in supporting the out of Africa hypothesis. However, mtDNA could not give all the answers to how humans moved throughout the world, and for that he turned to the male Y chromosome. By examining this, he and many other geneticists discovered the different changes throughout populations, and could estimate how long ago they occurred. According to Wells, modern humans were in Africa 60,000 years ago, and from that point began to migrate outward. For each new area, such as Asia, the Middle East, Australia, and others, there were specific polymorphisms on the Y chromosome that defined each population. By using this technique, he was able to map out when modern

In the Article “Redrawing Humanity’s Family Tree” by John Noble Wilford, describes how two different skulls challenge the theories of human origins and migrations. The Central African skull, that dates back to nearly 7 million years ago, was assigned to a whole new genus and species because of its apelike and evolved hominid species. The 1.75-million-year-old Georgian skull shows evidence that the first hominids may have been intercontinental travelers who set motion the migrations that occupied the whole planet. Finally a third skull was found that is the same age and shares a resemblance but, the size of the skull suggests that the brain was smaller than expected for H. erectus.

Discoveries relating to the human lineage are extremely exciting and often baffling. This is the case with the recent discovery of what seems to be the oldest member of the human family. A skull found in northern Chad in 2001, has been deemed the earliest relative to the human ever found. Nicknamed Toumai, and discovered by Michel Brunet and his paleontology team, this new category of human has been given the scientific name, Sahelanthropus tchaensis. What makes this skull so definitive is the fact that it dates back approximately 6-7 million years in the earth’s history (Whitfield 2002). Since the discovery there have been anthropologists and paleontologists that have

The last theory states that Neanderthals were not in fact a separate species, but interbred to a greater or lesser extent with the incoming Homo sapiens, whose genes eventually became dominant at the eventual expense of the genes delivering Neanderthal characteristics. This hypothesis comes from the fact that Neanderthals and Cro-Magnons inhabited the same regions of Europe for thousands of years. It is not beyond a doubt that they did come in contact with one another, possibly even trading and communicating.

Some researchers believe the Out Of Africa expansion took a southern route, following the Indian Ocean coastal boundary down in to Indonesia and finally into Sahul (Bar-Yosef and Belfer-Cohen, 2013; Derricourt, 2005; Field and Lahr, 2005). However, genetic testing of aboriginal inhabitants of Sahul favors a combination of southern and northern routes. The northerly migration path traversed through the Altai Mountains, and shows a consistency with Denisovan genetics (Cooper and Stringer, 2013:321; Davidson, 2013:3). Modern human gene flow with Denisovans is believed to have occurred in the mainland area of Asia, before migration to Sahul (Cooper and Stringer, 2013:322; Reich et al.,

The fossils which passed the amino acid tests were called “transitional” elements between the two species.  They represented a part of Europe where the Neanderthals and early humans would have more than likely encountered each other.  The same DNA sequence was found in Neanderthals and early humans, but also in ancient cave bears from Croatia and Austria.  This made the researchers skeptical of their findings and decided to test for mtDNA stands.  When the fossils were further analyzed, the researchers found that the mtDNA embedded in the Neanderthal fossils was of a different strain than that in the early humans, which was of course, different from that of the ancient cave bears.

One of the most fiercely debated issues in paleoanthropology points at the origins the primate species. The top two continents that have been very evident in our origins that can be traced to Africa and (Eur)Asia. African origin stresses the multiregional continuity theory it suggests a single origin for modern humans and gives an explanation to the Out-of-Africa model for the patter of our human evolution.

Humans began their diaspora from Africa about 70,000 years ago (Newsreel.org, 2014). Since then, we have stretched to a variety of geographic locations in every corner of the world. A biological definition of race advances the idea populations within species have discernible characteristics compared to other populations, thus suggesting the presence of sub-species under Homo sapiens. This has been falsified by many scientists. Dr. Alan R. Templeton says “there are not enough genetic differences between groups of people to say that there are sub-lineages of humans” (Fitzpatrick, 2003). In fact, the genetic differences between individual humans are entirely small about 0.1% (Humanorigins.si.edu, 2014). Human populations have not been geographically barred nor isolated from one

According to physical evidence, and theories, scholars have concluded upon a whole hypothesis. Based on their knowledge and belief, modern humans diverged from Homo sapiens between 200,000 and 150,000 years ago specifically in Africa, that between 125,000 and 60,000 years ago members of Homo sapiens left Africa, and that these

As a result Neanderthals and modern humans coexisted for thousand of years both in Europe and in Asia, sometimes populating the same caves at different times, before Neanderthal extinction. Even though the prehistoric population density of Neanderthals and humans were probably very low and potential encounters could have been quite rare (Shea, 2007), their concurrence raises question about the type of interaction that must have happened between the two different populations and the possibility of interbreeding (Shreeve, 1995).

Human evolution is the gradual process in which people, or Homo sapiens, originated from apelike ancestors. Scientific evidence, particularly in the form of fossils and secondary remains, show that the physical and behavioral traits shared by all people evolved over a period of approximately six million years. Humans are primates. Both genetic and physical similarities show that humans and the great apes (large apes) of Africa, chimpanzees (including bonobos, or so-called “pygmy chimpanzees”) and gorillas share a common ancestor that lived between 8 and 6 million years ago. The volume of fossils found in Africa suggests that most evolution occurred there and is likely the place of origin for early humans. This brings to fruition the “out of Africa” theory, also called the “single-origin hypothesis.”

There has been a great deal of heated debate for the last few decades about where modern Homo sapiens originated. From the battle grounds, two main theories emerged. One theory, labeled “Out-of-Africa” or “population replacement” explains that all modern Homo sapiens evolved from a common Homo erectus ancestor in Africa 100,000 years ago. The species began to spread and replace all other archaic human-like populations around 35,000 to 89,000 years ago. The rivaling opinion, entitled the “regional continuity” theory or “multiregional evolution” model refutes this theory and states modern humans evolved from various species of Homo erectus who interbred with others that lived in

Human evolution according to research started over 6 million years ago. The outcome of the evolution process is the current human beings. Scientific studies have revealed over the years a remarkable affinity between the chimpanzees/Apes and human beings. Even though this reality is not a definitive prove that human beings evolved from apes, it does show that the human beings are in one way or another related to other primates. Scientists suppose that the humans and the primates shared a common ancestor. The subject of what makes humans what they are and their origin has been the exclusive purpose leading to many scientific studies globally (Coolidge & Wynn, 2011). Studies believe that Africa was the origin of evolution millions of years ago. Fossil remains have been discovered in different parts of Africa as well as other regions of the world. Different hominins have been discovered around the world in the last 1 million years. Thus, the different discoveries have led to comparisons between the various species of hominins to clarify on their similarities as well as differences. This essay seeks to explain whether they were distinctively different species or regional versions of the same species.

Nearly everyone feels some desire to learn about their past and the origin of their ancestors. In Bryan Sykes’ novel, The Seven Daughters of Eve, he takes his readers through the experiences he faced and obstacles he overcame while piecing together the ancestral past of Europe. Ninety-five percent of living native Europeans can trace their past back to one of seven women, whom Sykes named Ursula, Xenia, Helena, Velda, Tara, Katrine and Jasmine. He discovered these clan mothers by studying the mutations found in the control region of mitochondrial DNA. People who had the same or very similar mitochondrial DNA sequences were grouped together and in the end Sykes was left with seven groups. The purpose and benefit of comparing mitochondrial DNA is that every person receives their mitochondrial DNA from their mother. While recombination shuffles and changes the genes in chromosomes, mitochondrial only changes through mutation, making it a reliable source for genetic study. With mitochondrial DNA by his side, Sykes began to look for answers to some of the world’s greatests questions concerning ancestral origin and human colonization throughout the world.