Bidding farewell to the mythical Dragon, the world welcomes the Year of the Snake on January 29 — the first day of the Lunar ...

Scientists have made a discovery that may finally answer the age-old question: Which came first, the chicken or the egg ... one-third of the organism's life cycle, a phenomenon they define ...

GENEVA, Switzerland — Which came first, the chicken ... animal embryonic development. It turns out that the genetic machinery for creating eggs — the fundamental starting point of complex life ...