Is it truethat the chicken came before egg?

This is a classic philosophical question, and the answer depends on how you define "chicken" and "egg".

Scientifically:

* The egg came first. Eggs predate chickens by millions of years. The first amniotic eggs (eggs with a shell and internal membrane) evolved long before dinosaurs, let alone chickens.

* The chicken came first. Technically, a chicken egg was laid by a bird that was not quite a chicken. Over time, through evolution, these birds gradually became what we recognize as chickens. So, in this sense, the chicken came first.

It all comes down to perspective:

* If you define "egg" as a chicken egg, then the chicken must have come first.

* If you define "egg" as any amniotic egg, then the egg came first.

Ultimately, the question is more about the nature of evolution and how we define species than about a simple "either/or" answer.