What came first, the egg or the chicken? The dilemma has caused everyone, from classroom teenyboppers to leaders, to scratch ...

Although the phrase "what came first, the chicken or the egg" at first appears paradoxical ... We know that single-celled ...

The age-old debate of whether the chicken or the egg came first is explored through ... This means that two proto-chickens mated, combining their DNA to form the very first cell of the very ...

They say the tools to ­create eggs appeared long before chickens evolved. How the first life forms — single-cell organisms around 3.7billion years ago — evolved into far more complex forms is ...