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This question has been asked for centuries, without really finding a definitive answer.
From scientists’ point of view, knowing which came first, the egg or the chicken, is rather logical. Over time, species evolve according to principles of genetic mutations and natural selection. In the case of the chicken, science has proven that birds evolved from prehistoric reptiles and that chickens’ ancestors evolved to become egg-laying birds, indicates 20 Minutes.
Through this understanding of the evolution of species, it’s easier to affirm that the egg appeared first: from year to year, prehistoric reptiles developed the ability to lay eggs, a characteristic that was then transmitted to their descendants, and in particular to chickens.
For their part, philosophers are still wondering… But which organism laid the egg that saw the first bird emerge? According to some, bird-like creatures laid eggs and hatched chicks that were genetically similar, but not identical to the chickens we know today, 20 Minutes points out.
