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Essays on human evolution
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It is estimated that humanity began millions of years ago (Smithsonian, 2015). Humans evolved from ape-like creatures, which is why we are considered primates. Homo sapiens, as paleontologists call us, are the only species of humans left in the world today. However, that was not always the case. Thousands of years ago, there were many other ancient species, called hominids (Evolution, 2001), on the planet that we had to compete and try to coexist with. Evidently, humans did not coexist very well since there are no hominids left in the world today. Or are there?
The most widely believed explanation of the origins of modern humans is the “Out of Africa Model” (Figure 1). This model says that humanity’s homeland is Africa. Humans simply migrated out of Africa and gradually replaced any other hominid species that they came in contact with (PBS Learning Media, 2007).
Figure 2- What a Neanderthal man probably looked like (BBC News, 2012).
One example of an ancient species was the Homo neanderthalensis, or the Neanderthals. Like us, the Neanderthals originated from a common ancestor that came out of Africa. However, the Neanderthals migrated to Europe long before we left the continent. Because of this migration, as well as a
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While we evolved in Africa, they evolved, too, and we had no contact with each other for thousands of years. Homo sapiens began to migrate from Africa roughly 60,000 years ago; approximately 30,000 years ago we finally met our long-lost cousins (National Geographic, 2015). There is evidence to suggest that our first interactions were not pleasant ones. In fact, most people suspect that we drove out the Neanderthals. This is because the Neanderthals died out at roughly the same time that we arrived in Europe. Many scientists suggest that we did this by outcompeting or outright killing them. However, there is a new, gentler theory that has to do with our
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.
Many people believe that we originated from apes and monkey. We can now possibly learn many things from studying and observing chimpanzees and monkeys.
It is said that the humanoid existence begins in Africa. It is no coincidence that Africa is also the home to Chimpanzees, Pan troglodytes, and Bonobos, Pan paniscus. These are humans’ two closest living relatives, both sharing almost 99% of the human genome through common descent. While humans were said to have separated from Chimpanzees around 5-7 million years ago , Bonobos separated from its Chimp cousins around 2 million years ago . Bonobos inhabit a single part of Africa, Democratic Republic of Congo South of the Congo River, unlike the Chimpanzee, which inhabits Across West- and Central Africa, with remaining populations distributed over several countries. While these two apes where once thought to be the same species, up until the beginning of the 20th century , there are many differences socially, as well as physically, that make Bonobos more than a Pygmy Chimp. With disparities in morphology, behavior, perhaps even emotions and cognition, and known as the “make love, not war chimp” , how can this ape be so vastly different from its notoriously violent Pan cousin, but yet share the same amount of similar DNA to Homo sapiens? And what does this mean for the studies of human and past humanoid behavior?
Trinkaus, E. (2007). European early modern humans and the fate of the Neandertals. Proceedings Of The National Academy Of Sciences Of The United States Of America, 104(18), 7367-7372. doi:10.1073/pnas.0702214104
Neanderthals lived in Europe and Western Asia between 200,000 and 30,000 years ago. Fossil record shows that around 150,000 years ago (Bar-Yosef, 1998; Grün & Stringer, 2000) their range extended from Europe to Middle East and Asia spreading to Uzbekistan and Russia (Herrera et al., 2009). They were probably the only hominin group living in Europe and Western Asia for a long period of time until the arrival of modern humans. Their extinction is dated at around 30,000 ye...
How humans spread around the world is still one of the mysteries in the history of mankind. Mitochondrial DNA has been a crucial line of experimental evidence in developing the current understanding of our genetic history. It has shed significant light in determining the population patterns and human migrations around the world. Studies of mitochondrial DNA have provided new insights in the way humans spread around the globe throughout time. Studies have suggested two major routes from East Africa through which humans exited Africa and colonized the globe. An early route through the tropical coast of the Indian Ocean to southeast Asia and Australasia 60-75 thousand years ago (kya) (Macaulay et al, 2005: 1034), and followed by a dispersal via the Levant into Europe and North Africa 40-45 kya (Atkinson et al, 2008: 472), these routes are often referred as “Out of Africa” migration.
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.
In recent years, the Homo Neanderthalensis were viewed as “subhuman brutes”, but are now seen as a different species from our own (Balter 2001). The Neanderthals were a branch of the Homo genus that evolved in Eurasia at least 200,000 years ago (Fagan 2010). The first Neand...
The proponents of the separate species hypothesis believe that they had a common ancestor, but Neanderthals and modern humans were separate species. They argue that the Neanderthal line was a dead end, and that for some reason Homo sapiens thrived while they went extinct.
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.
“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.
Research shows that the Neanderthals had a “protruding jaw, receding forehead, and weak chin.” (Ansering Genesis) The average brain of a Neanderthal was slightly larger than a modern humans brain. It is also stated that this specific species generally was larger in body size. The Neanderthals also tend to live mostly in colder climates. Researchers and paleontologists found many remains left by the Neanderthals, which include bones and stone tools, found in Eurasia, Western Europe to Central, Northern, and Western Asia. “Neanderthals (or Neandertals) are our closest extinct human relatives. There is some debate as to whether they were a distinct species of the Homo genus (Homo Neanderthalensis) or a subspecies of Homo sapiens. Our well-known, but often misunderstood, fossil kin lived in Eurasia 200,000 to 30,000 years ago, in the Pleistocene Epoch.” (Live Science) The Neanderthals had a very similar appearance to human, although they were “shorter and stockier with angled cheekbones, prominent brow ridges, and wide noses.” (Live
Why are humans not from the Americas, but from Africa? Many scientist in the world believed that humans evolved from animals like monkeys and gorrilla which lived in Africa, so that might be one of the reasons why humans aren’t from the Americas. Because the earth's tectonic plates broke apart and formed into continents humans didn’t get the chance to end up in the Americas, and humans back then didn’t have any other transportation except for their feet so the couldn’t get across the ocean to get to the Americas. Soon humans migrated to the continents in Africa like Asia and Europe.
According to Britannica Encyclopædia, Australopithecus anamensis lived in Kenya between 4.2 million and 3.9 million years ago. A. afarensis lived in eastern Africa between 3 and 4 million years ago. This australopithecine had a brain size a little larger than chimpanzees. Some had canine teeth more sticking out than those of later hominines. No tools of any kind have been found with A. afarensis fossils.
Mankind’s origin was not a result a ridiculous theory that a big bang occurred, causing life to begin. Neither was mankind a single cell organism floating around in the ocean. Mankind was not formed by a mutation of organisms in the sea. Man’s origin did not come from another life source from another planet.