Which came first…an egg or a hen! 

Almost all of us have wondered it a few times during schools. Essence of the question is, a hen lays eggs but the itself comes from the egg. So, what predates what…! 

Modern science upon the studies of development of life on Earth answers this question. Life evolved in the oceans in much simpler form as single cell bacteria. Then, more complicated multiple cell organisms evolved. It was millions of years later, more advanced forms of life such as animals, fish birds etc. evolved.

It is found the eggs appear very first in the development cycle of species while the development of birds happened very late in the development cycle millions of years later.

For example, a lot many species both primitives and more advanced ones, lay eggs. The lizards, the fish and many smaller life forms lay eggs. The hen or the birds per se came into existence much later. Birds are advanced forms of a few of those species which lay eggs.

So, now you know, it’s the egg which came first. X

Species development is long term process and it takes millions of years to develop new species. This usually happens through gradual DNA changes.