Discovered in by Mary Leaky, it lived 1. Homo habilis are credited with making stone tools and basic weapons. They were taller than their ancestors. Homo habilis had huge non-human molars, a small brain, and a large sagital crest. Their main diet was probably wild fruits, nuts, roots, and vegetables. Although, the handy man did not have skills to make fire they built fire camps out of existing fires. The Homo erectus succeeded the Homo sabilis.
They existed between 1. He was about the same size as the modern man although the size of their brain was two third the size of human brain. Their tool making skills improved considerably; they made stone axes and knives. Homo erectus made fire and cooked their food. Besides fire camping, fire brought about social occasions in.
Homo erectus had much semblance with human especially their teeth and jaws. Scientist discovered that these early men skeleton was shaped like modern man. Their skulls grew forward for their brain to develop.
Besides, creating stone tools, and bone needles and fish hooks, the Homo sapiens sew clothes from animal skins. The Homo sapiens were also hunters and gatherers. In conclusion, several other discoveries that purport the existence of early man lack credibility. Piltdown man, also known as the dawn man and scientifically referred as Eanthropus dawsoni was discovered by Charles Dawson in He concluded that Piltdown man existed in million years ago, had ape-like jawbone but the teeth and the skull resembled that of human being.
They claimed that the skull was indeed human and the jawbone was of a modern ape whose teeth were filed to resemble that of human. Again, Nebraska scientifically known as Hesperopithecus haroldcookii was discovered in Pliocene deposits of Nebraska in by Mr.
It was publicized by Henry Osborn who likened its teeth to that of man. Unfortunately, he failed to conclude whether Hesperopithecus was an ape or human ancestor. This is a great puzzle to science.
Drs Elliot and Gould theorized one possible answer, now known as the theory of Punctuated Equilibrium. This theory states that evolution takes place in a cycle consisting of a long period of little evolution followed by a relatively short period of much change and evolution, probably caused by large changes in an environment, such as the onset of an ice age or the death of a very large amount of organisms and species, thus clearing much evolutionary space.
By this theory, since the intermediate periods would be so relatively short, the chances of an adequate fossil being preserved are very small, which explains why we don? The problems with this theory abound.
What reason is there for such evolution to occur at this time more than at any other? Richard Dawkins suggests that perhaps there is a gene that causes an increase in mutation rates, but since as a whole this sort of mechanism would tend to be detrimental rather than helpful to most organisms, and it as yet has not been discovered in any case, this would certainly be a very weak foundation upon which to rest a theory.
The other large problem modern science has with evolution is that the simple process of elongating an already existing organ structure would require more than just a simple change in one gene.
Take, for example, the lengthening of a finger: Further, such a change would alter the delicate balance of the structure in question. A new balance would have to be achieved. All of these problems would largely been taken care of on a microscopic scale, by a multiplicity of proteins and enzymes.
True, proteins and enzymes are what is coded by the genes in DNA, but to create all these proteins, more than one or two genes would need to be changed. At the very least, several dozen simultaneous cooperating mutations would have to take place, and no one needs to be told how unlikely that is. To elaborate on mutations for a minute, no one argues with the fact that they are almost always detrimental to the organism in question. Even when, by some twist of fate, the mutation happens to be helpful, it is more often because of the malfunction of a particular enzyme that interferes with a process that in the current environment happens to no longer be the preferable way of doing things.
More basic than all of these problems, however, is the simple logical problem. For an organism to benefit from natural selection, it has to develop features that will help it survive and reproduce before the environmental condition that makes it so comes into existence. A gene would have to predict what sort of changes would be beneficial ahead of time. Evolutionists maintain that this is not in the slightest bit what actually occurs. Mutations occur constantly, most detrimental, as we said, and the rare few that are beneficial just waiting around until they are called for.
This argument is very weak for the simple reason that it is very easy to picture life dying out hundreds of times, simply because it never developed the right genes in advance. The Theory of Evolution is long-standing and widely supported. Questions are just being asked, and there is certainly a good probability that many of them will be answered.
This sort of questioning is precisely the sort of approach the that leads to further understanding and discovery in all the fields of science. I feel that there are clearly some fundamental problems in the current theory of Evolution. There is not question that it at least works on a relatively small scale, within a species.
This has been proven without a doubt. It is only with regard to the great diversity of life all around us, the efficiency and intelligence of their mechanisms, and of course their origination? In that light, science is doing all it can to find answers. For now, however, the Theory of Evolution is in serious question, and our origins remain unknown.
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- Charles Darwin’s theory and evolution Introduction: Charles Darwin was an English scientist who developed the theory of evolution which had been around for long period of time which gave him fame during his life and after his death.
We Can Write a Custom Essay on Darwin's Theory of Evolution for You! Darwin's theory was widely hailed at the time of its publication as being an excellent explanation for the diversity of living things on our planet, and as time .
Charles Darwin proposed the theory of evolution to explain the origin, diversity and complexity of life. I will will disprove evolution by showing that natural selection only explains small evolutionary changes, collectively known as microevolution. Natural selection cannot drive large evolutionary changes, macroevolution. This free Science essay on Essay: Evolution and Charles Darwin is perfect for Science students to use as an example. What is the modern status of Darwin’s theory of evolution? A. All of the basic concepts have remained sound, and have survived extensive challenge and testing. There was a great deal of evidence in support of Darwin.
Essay on Charles Darwin's Theory of Evolution by Natural Selection - When the name Charles Darwin is uttered, an immediate association brings about the concept of Evolution. Although he was not the first to "discover" this phenomenon, he . Charles Darwin in his theory of evolution suggests that man evolved from ape-like creatures. In this theory, there is an indication that the early man was distinct from apes.