wold you like some eggs?

We had another anathomy lesson today. Today's subject was eggs; how do I know the quality of an egg, how do I check it and what else can there be outside the supermarket eggs.
It was very interesting. I for example thought that the eggs can rotten in the fridge. Everywhere everyone said (when I was small) that don't break the egg in the bowl with others because if it's rotten then you'll have to throw them all away.
We learned today that eggs cannot rotten in the fridge if the shell is free of any fractures. They showd us eggs that have been in the fridge for 2 years and those eggs were just dried out.

There's also different kinds of "malfunctions" which you can see in this picture. Some of the eggs are two colored and that's because the eggwas still inside the chicken when the message was send to build another shell so it's just another layer on top of the former one. Then there's a twin egg and the shell was buid to surround the both of them. What can also happen is that the eggs just faintly resemble eggs and are fragile or already broken when they come out.

I bet you've never thought of this. You just go to the supermarket and happily buy your eggs there. At least I did. =)