The Debate Over the Origin of Modern Homo Sapiens
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 places such as Asia, Africa, and Europe. These scientists believe this theory would explain why there are differences among races around the world.
As sound as the regional continuity theory appears, it seems to be slightly lacking in genetic support. It appears that most of the support of this theory depends on fossil record which is important information but not stable evidence. The Out-of-Africa theory relies on more than just fossil evidence but a combination of fossils and genetic studies. It is important to use this information as well as the fossil records because “various interpretations of the transition are possible if researchers concentrate on only fossil evidence, while the mtDNA studies more strongly support replacement….the best approximation of the process still appears to be an African-based spread” (Nitecki and Nitecki, 1994). In a time where technology is becoming an integral part of society, it is easier to discover information that did not seem possible before.
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Over the last few hundred years, more and more has been added to the world’s fossil collection, fossils from all over the world. New theories have been created and old theories have almost been proven about the evolution of man. For example, we have proof that different species of man existed with certain types of DNA sequences and instincts, some we may not have anymore, or some that other species did not have back then. Even though it is subjected to much debate, one of the most widely accepted theories however, is that Homo sapiens interbred with the slightly more primitive species of man, the Neanderthal.
...G.E., Ioannou P.A., Scheer W.D., Herrera R.J. et al. 1994. Africa origin of human-specific polymorphic Alu insertions. Evolution Vol. 91: pp 12288-12292
To set the stage, we must go back 270 million years ago when a majority of the earth’s land masses were collected together in a single continent, a supercontinent, named Pangaea (Encyclopedia Britannica, 1). Historian Alfred Crosby explained that this collected all of earth’s land based biology into a single place, creating a single Darwinian “arena for competition” (Crosby, 1). Or in other words, one big evolutionary pot. Crosby also explains that 180 million years ago, Pangea split into two major land masses, what is now the Americas in the Western Hemisphere as one land mass and Euro-Asia and Africa as the second lass mass (Crosby, 1). What was once a single evolutionary pot, was now two, allowing for plant and animal life to take different evolutionary paths. These two worlds remained relatively separate from each other until the arrival of Christopher Columbus and other European explorers. That contact between the old world and the new world brought two distinct evolutionary arenas crashing into each other and returned a majority of the earth’s landmass into a single Darwinian pot, (Crosby, 1) This was Crosby’s re-knitting of the torn “seams of Pangaea.”
Myers, provider of source material for Edie Heydt's notes from "Human Origins," fall 1997, Alfred. Much of the material in the notes is paraphrased, and the original information sources are unknown.
This paper has shown how Homo sapiens had several advantages over the Neanderthals including better diets, better tools and just better luck. The Neanderthals could not survive the harsh climates they were thrust into and eventually died out. In this paper I looked at how Homo sapiens and Homo neanderthalensis had co-existed but the disappearance of the Neanderthal ius due in some part to the appearance of the more culturally advanced and genetically superior Homo sapiens. Although the How and Why of how Neanderthals went extinct, it is clear that Homo sapiens had a part in their demise. In the last one hundred and fifty years that we have been studying humans we have seen them come from savage brutes, to Homo sapiens respectable contemporary. If we had not gotten lucky in the past, Neanderthals could be studying us today.
Neanderthals and modern humans coexisted for well over 100,000 years. Then suddenly Homo neandertalensis began to die out and surrender the earth to Homo sapiens. Paleontologists and anthropologists have entertained several possibilities to the causes of this event: interbreeding among Neanderthals and humans, competition for natural resources, and Darwin’s theory of “survival of the fittest.” What the real cause has been has plagued scientists for years. Now, due to an international research team from Germany, those possibilities have been even further deduced, making it easier to pinpoint the exact reason Homo neandertalensis became extinct.
1. The two major differences between Medicare and Medicaid are who the plan is provided for and who is in charge of providing each plan. The majority of other differences stem from these two dissimilarities. Medicare is a health insurance plan for people over 65 years of age (also includes a few other smaller groups such as younger children with certain disabilities), while Medicaid is provided for citizens who cannot afford other healthcare insurance plans due to their low income. Because of this, Medicaid pays the providers less, so it is not uncommon that doctors will refuse to take patients who use Medicaid. Medicare, on the other hand, hardly ever negotiates prices, so doctors usually end up receiving what they charge. Medicare is completely
Medicaid supports children who are under the age of nineteen, people over the age of sixty five, enrollees who are disabled and those that need permanent nursing home care. Potential beneficiaries can find an application for Medicaid at their State’s Medicaid agency (Medicare.gov, 2008).
Clearly, the Medicaid program is ripe for a major overhaul, a task that the federal government has thus far been unwilling to undertake. I chose this topic because I believe that the Medicaid program can be rescued and revitalized by leadership; otherwise, it is likely to be eroded. Medicaid is a government-sponsored program whose objective is to provide patients with health assistance upon meeting specific criteria. Medicaid is an insurance program that is available for disadvantaged persons, including the elderly, who cannot afford health benefits because of low incomes or other factors. This program is subsidized by government funds and in many instances, will cover the costs of basic medical care as well as specialized testing and supplies. What are the problems with Medicaid and what should be done about them? This paper will look at 6 articles about the economics of Medicaid and analyze what should be done about this problem.
My research strives to answer the presence and degree of interbreeding between Neanderthal and Modern humans. Researchers use different comparisons of the fossil record, phylogenetic, morphological, and genetic methods to explore these questions in more detail. The literature provided many positive correlations to my hypothesis that Neandertals and Modern Humans interbred on a small-scale basis after the dispersal of modern humans from Africa. The literature also predicts a time frame of likely interbreeding. To explore this question it is important to research article’s explaining the statistical, genetic, and physical evidence associated with possible interbreeding.
Individuals living with severe mental illness accounted for 9.8 million adults in the year 2008. Among these, 58.7 percent used mental health services, 40.5 percent received outpatient services, and a little over seven percent received inpatient services for a mental health problem (Addiction and Mental Health Treatment Center, 2009). Globally, there is a chance that one out of four people will experience some kind of mental heal...
“The scientific study of how humans developed did not begin until the 1800s in Europe. Until that time, people relied on religious explanations of how humans came into existence. Starting in the 1500s a scientific revolution began to sweep Europe. Thinkers started using scientific methods and experiments to try to better understand the world and the creatures living in it. Eventually these methods were turned to the question of human origins” (The Nature Of Human Origins, 1). Earth made it possible for species to change over time because Ancient Earth provides ability to plenty of time.The Homo Sapien a is very complex creature. The species started off very simple by living in caves and surviving with little food and then later evolved into a species that were able to do many more complex things. The first species was Sahelanthropus tchadensis They were one of the most simple humans in that time period and on. 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.
Federal government matching funds are provided to the states based on their per captia income. The majority of medicaid beneficiaries are children. One in four children in the United States is covered under Medicaid. The remaining recipients that are involved of more than eighty million noneldery (54 years and under) adults with children at home.
The evidence for human evolution begins with the australopithecines. All the australopithecines were bipedal and therefore possible hominines. In details of their teeth, jaws, and brain size, however, they modify enough among themselves to be divided into five species: Australopithecus anamensis, A. afarensis, A. africanus, A. robustus, and A. boisei. Genus Homo are also divided in five different spices: Homo erectus, H. habilis, H. sapiens, and H. sapiens sapiens.
Mankind’s origin is from God through creation. The Bible tells us in Genesis chapter 1 verse 27; So God created man in His own image, in the image of God created He him: male and female created He them. The Bible also says in Genesis chapter 2 verse 7, And the Lord God formed man of the dust of the ground and breathed into his nostrils the breath of life; and man became a living soul.