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According to the theory of evolution, it works like this:

Every once in a while, an organism develops (having genes slightly different from its parents) that's different from its parents.

If that difference is helpful to the survival of that organism or its children, which is very unusual, then that organism is likely to have more surviving offspring than others. It is said to be favored for survival.

Over the course of many generations, we assume that the variation that increases surviving offspring will come to be the dominant (regular) characteristic in the population.

Remember: evolution only happens to populations, not to individuals (except in fiction).

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13y ago

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