The theory of evolution maintains that those living organisms that best adapt to their environment have more opportunities to survive and multiply, and therefore, they can pass on their advantageous characteristics to subsequent generations, and species evolve by way of this "mechanism."
But the fact is that the mechanism in question-known as natural selection-cannot cause living things to evolve, nor endow them with any new features. It can only reinforce existing characteristics belonging to a particular species.
In any given region, for example, those rabbits able to run fastest will survive, while others die. After a few generations, all the rabbits in this region will consist of fast-running individuals. However, these rabbits can never evolve into another species-greyhounds or foxes, for instance.
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