Essay on human evolution

Homo erectus was first found in Africa and the fossilized remains dated 1.8 and 1.0 million years old. The Homo erectus traits are very similar toward the modern human traits. Homo erectus brain size was smaller than the Homo sapiens. Homo erectus had a brain size of approximately 650 cc and Homo sapiens had a brain size of approximately 1251

In the quest to explain human origins it is necessary to find a species that bridges modern man (Homo sapiens) with the apes. To fill this gap evolutionists have set forth Homo erectus, who lived approximately 400,000 to 1.6 million years ago (Johanson and Shreeve1989). Although the distinctions are somewhat vague, below the neck, Homo sapiens and Homo erectus are practically Identical and Homo erectus was responsible for pioneering the use of standard tools (such as the hand axe), big-game hunting, and the use of fire (Johanson and Shreeve1989).

In this essay I am looking at where Psychology as a discipline has come from and what affects these early ideas have had on psychology today, Psychology as a whole has stemmed from a number of different areas of study from Physics to Biology,

of some sort to the general human gene pool, enough to be considered a different

Human evolution is the biological and cultural development of humans. A human is any member of the species Homo sapiens, meaning "wise man." Since at least the Upper Paleolithic era, some 40,000 years ago, every human society has devised a creation myth to explain how humans came to be. Creation myths are based on cultural beliefs that have been adopted as a legitimate explanation by a society as to where we came from.

Within psychology, there are several perspectives used to describe, predict, and explain human behavior. The seven major perspectives in modern psychology are psychoanalytic, behaviorist, humanist, cognitive, neuroscientific/biopsychological, evolutionary, and sociocultural. Describe the perspectives, using two to three sentences each. Select one major figure associated with one of the perspectives and describe his or her work in two to three sentences. Type your response in the space below.

Although Charles Darwin is usually just looked at in the light of purely biology, his work that impacted other fields such as psychology or his work that lead to the rapid expansion of certain fields such as ethology, is often looked over. Darwin’s work impacted these fields both directly and indirectly at such a level of influence that some people believe that psychology should be looked at as pre- and post-Darwin. On the Origin of Species, while being primarily about biological phenomena and theories, was one of these works that impacted psychology indirectly. Other than giving a new perspective for psychologists to possess when contemplating different ideas, Darwin’s work on natural selection lead to the creation of evolutionary psychology.

This in turn allowed them to consider the context of differing abilities to cope with fluctuating resources, different variables, and overall paths in brain development between Neanderthals and anatomically modern humans (AMHs). Although Neanderthals did share similar brain sizes comparable to anatomically modern humans (AMHs), nevertheless Neanderthals brain cases were elongated and not globular as in Homo Sapiens implying that anatomically modern humans (AMHs) and Neanderthals reached fairly large brain sizes along dissimilar evolutionary paths. In their underlying research, they hypothesize that similarly sized brains of both Neanderthals and anatomically modern humans (AMHs) were ostensibly organized differently for two

One of the most astonishing things on earth is the human body. They consist of many organs that work together to maintain the person alive. The humans body composition is complex, but what was the origin? How did we become who we are today? These are the questions that intrigued me, and allowed me to understand how the human body evolved over the years. By the examination of our ancestors, and our body we will understand how we look today.

       In the article, "Natural History of Homo erectus" by Susan C. Antón discussed our view of H. erectus is different today than when Pithecanthropus erectus, then only the second fossil hominin taxon to be discovered, was described by Dubois (1894) (Antón, C. Susan, 162). H. erectus was the most primitive and smallest-brained of the fossil hominins (Antón, C. Susan, 162). Therefore, early observations expended significant effort showing that the Indonesian fossils from Trinil were actually hominins (Antón, C. Susan, 162). Thus, it took the dismissal of Piltdown and the broad acceptance of Australopithecus as a hominin ancestor, along with the substantial Asian

over time, due to psychologists coming to light in the modern world. This essay will also

There is evidence to suggest that Homo neanderthalensis and Homo sapiens had coexisted for approximately 35-40,000 years, (Fagan 2010) from around 60,000 years ago to 25,000 years ago when they finally went extinct (Gibbon 2001). Anthropologists are still uncertain what the cause of their extinction was. This paper will analyze three main theories of Neanderthal extinction. The first theory is the competition theory, which claims that the Homo sapiens and Neanderthals had to compete for resources, ultimately leading to their demise. The second theory I will discuss is the climate change theory, which claims that Homo sapiens lived while Neanderthals died because they were better adapted to the climate. The last theory I will discuss is

Biological evolution is the name for the changes in gene frequency in a population of a species from generation to generation. Evolution offers explanation to why species genetically change over years and the diversity of life on Earth. Although it is generally accepted by the scientific community, Charles Darwin’s theory of evolution has been studied and debated for several decades. In 1859, Darwin published On The Origin of Species, which introduced the idea of evolutionary thought which he supported with evidence of one type of evolutionary mechanism, natural selection. Some of the main mechanisms of evolution are natural selection, mutation, and genetic drift. The idea that all life on Earth shares a common ancestor has been around for

Humans have existed on Earth for approximately 3.4 million years. The oldest known human ancestor is "Lucy," an Australopithecus. Over this extensive period of time, humans have evolved significantly. Homo Sapiens have grown from 3 to almost 6 feet (average), lost most of the body hair, became leaner and adapted to walking. Humans have come a long way, from Australopithecus to Homo sapiens, from living in trees to living in cities. Slowly, through hundreds of thousands of years, we mutated over and over again, natural selection ensuring that no destructive mutations continue. From the slow evolution, four distinctive species emerged and died out, each giving way to its ' descendant: Homo Habilis, Homo Erectus, Homo Sapiens Neanderthalesis, and Homo sapiens Sapiens.

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.