finally, a question answered.

Which comes first, the chicken or the egg?

two answers, one serious and one retarded.

the serious answer:
The egg came first. We know that chickens evolved from some earlier, non-chickenoid form of life, e.g., the half-bird, half-reptile Archaeopteryx. These non-chickens, however, arrived in eggs. Ergo, eggs were on the scene before chickens.

the retarded answer:
The chicken came first because (sigh) the chicken had to get laid before the egg could...=P

Source: straightdope.com