The egg came before the chicken, moron. Each offspring has very small mutations in their genes which means their code is only about 99.99999999999999999999999999999% similar to their parents. This small change isn't enough to see a difference from one parent to its offspring, but over the course of hundreds of millions of years of these constant alterations, you begin to see deviations. This is known as Evolution. The egg came before the chicken.
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