"... the parent animal pre-exists, not only in idea, but actually in time. For man is generated from man; and thus it is the possession of certain characters by the parent that determines the development of like characters in the child." -- Aristotle, On the Parts of Animals, Book I, 350 B.C.
MSNBC: Scientists Reportedly Crack Chicken or Egg Riddle.
It is an age-old riddle that has perplexed generations: Which came first, the chicken or the egg?
Now British scientists claim to have finally come up with the definitive answer: The chicken.
The scientific and philosophical mystery was purportedly unraveled by researchers at Sheffield and Warwick universities, according to the Daily Mail newspaper.
The scientists found that a protein found only in a chicken's ovaries is necessary for the formation of the egg, according to the paper Wednesday. The egg can therefore only exist if it has been created inside a chicken.