First! First!
The chicken or the egg causality dilemma is commonly stated as "which came first: the chicken or the egg?". The dilemma stems from the observation that all chickens hatch from eggs and all chicken eggs are laid by chickens. "Chicken-and-egg" is a metaphoric adjective describing situations where it is not clear which of two events should be considered the cause and which should be considered the effect.
If the question refers to eggs in general, the egg came first, as the first egg-laying animals evolved millions of years prior to birds. If the question refers to chicken eggs specifically, the answer is still the egg, but the explanation is more complicated. An animal nearly identical to the modern chicken laid a fertilized egg that had DNA identical to the modern chicken (due to mutations in the mother's ovum, the father's sperm, or the fertilised zygote).
We're here visiting The written word
First! First!
The chicken or the egg causality dilemma is commonly stated as "which came first: the chicken or the egg?". The dilemma stems from the observation that all chickens hatch from eggs and all chicken eggs are laid by chickens. "Chicken-and-egg" is a metaphoric adjective describing situations where it is not clear which of two events should be considered the cause and which should be considered the effect.
If the question refers to eggs in general, the egg came first, as the first egg-laying animals evolved millions of years prior to birds. If the question refers to chicken eggs specifically, the answer is still the egg, but the explanation is more complicated. An animal nearly identical to the modern chicken laid a fertilized egg that had DNA identical to the modern chicken (due to mutations in the mother's ovum, the father's sperm, or the fertilised zygote).
We're here visiting The written word