Genetic material does not change during an animal's life. Therefore, the first bird that evolved into what we would call a chicken, probably in prehistoric times, must first have existed as an embryo inside an egg.
Professor John Brookfield, a specialist in evolutionary genetics at the University of Nottingham, who was put to work on the dilemma, said that the pecking order was perfectly clear: the living organism inside the eggshell would have the same DNA as the chicken that it would become.Of course, the conclusion is not entirely indisputable, especially in the non-reality-based community:
Creationists, for example, will argue that if God created Adam and Eve, he probably had a spare five minutes to knock up a chicken as well.
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