The fossil shows the embryo was in a curled position known as "tucking", which is a behaviour seen in birds shortly before they hatch. "This indicates that such behaviour in modern birds first ...

A young thornback ray fish saved after being allowed to grow in a sandwich bag has "hatched". The ray was trapped ... still at the embryo stage, in the bag. Two months on, it has now been released ...

Scientists on Tuesday announced the discovery of an exquisitely preserved dinosaur embryo from at least 66 million years ago that was preparing to hatch from its egg just like a chicken.