Science is the forerunner of everything. It allows you to have knowledge of nature and how the universe works. As a result, we encounter scientific laws and theories. First, why is this scientific theory and law? Scientific laws can generally be reduced to a mathematical equation. Thus, we can obtain precisely the result of what we want and what is given in appropriate conditions. Scientific theories are explanations made according to the evidence obtained from observation and research. It does not have a mathematical equation like scientific laws.

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### Evolution and Natural Selection

According to many scientists, all the creatures in the world are made up of one living horse. Evolution and natural selection are divided into many different types: plants, fungi, animals, bacteria, etc. Natural selection is to be able to reproduce the living creatures more favorable to life and transfer their genes to the next generation. Thus, it is the depletion and the elimination of the generation of living creatures incapable of living. The non-adaptable creatures disappear, the living creatures that can adapt to the environment evolve over time-in thousands of years-undergoing change. In other words, as they continue to live on the bears poles that can whiten their hides and thicken, the bears that can not pass these changes are gone.

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