The question of what came first, the chicken or the egg, is a classic philosophical conundrum that has puzzled humans for centuries. From a biological perspective, the egg came first, as it was laid by a bird that was not quite a chicken, but its evolutionary ancestor.
According to the theory of evolution, new species arise through gradual genetic changes that accumulate over time. In the case of the chicken, its ancestors were non-chickens that laid slightly different eggs. Over time, these genetic mutations accumulated until a new species, the chicken, emerged. So, the first chicken would have hatched from an egg laid by one of its genetic ancestors that was not quite a chicken yet.
In conclusion, while it is a difficult question to answer, from a biological and evolutionary perspective, the egg came before the chicken.