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Evolution is the development of life in planet earth. This theory goes back in time, when greek philosophers wondered about the origin of species and life on earth. Until Charles Darwin came into the scene, he introduced a new sciencific theory, him and his friend named Thomas Robert Malthus. Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations. Which means that the fittest survives and reproduces, while the weakest and the unfit species die out. At this point, population diverge into new species with compatible organism to continue living.

There are a lot of species on planet earth, each one of the species is unique and in each species, every creature is also unique with different traits than the other. This is because of our DNA. This can be explained in two different categories, the first one is: Recombination ~ is a process by which pieces of DNA are broken and recombined to produce new combinations of alleles. This recombination process creates genetic diversity at the level of genes that reflects differences in the DNA sequences of different organisms. The other is Mutation ~ is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors like blue eye color. Both, recombination and mutation. They happen in a random way that results in various species of offspring. All of the individuals are different and unique as we mentioned earlier, and this means that only the ones who have the required and necessary organisms in their DNA will be the fittest to survive while the other will just die out. When the fittest survives, they reproduce by making more fitting creatures that can survive in their environment.

We are the most intelligent species in Earth. We humans have been on this planet for a very long time. This shows that intelligence is not necessary for survival, because so many other species on earth have survived for much longer time than us. One of the primary principles that lead us to be intelligent is language. Language has helped us to communicate and pass our knowlegde to the next generation and to form new ideas and strategies to our group and community to better survive from predators.

Flaws of the Human Body: The human body is excellent in many ways and nobody can deny that, but there are some flaws within it. The human back is very weak, and all of us suffer from back pain at least once in our life-time. By around 1.9 million years ago, when the environment was “fluctuating wildly between moist and dry,” early humans had become “fully bipedal” and had evolved a uniquely human curved spine. The action of walking with two legs had big damages in our back. Also, the Evolutionary Origin of Descending Testicles were likely present in the earliest mammals, then subsequently disappeared in elephants, manatees and their relatives, according to a new study. The testicles are so vulnerable but that is because they need to be outside for a cooler temperature than the body, so we can say that human body has flaws and not perfect.

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