Well technically the egg is composed of the outer shell, yolk and egg white, so more accurately said is that these students hatched an egg without the egg shell, but either way this simple experiment proved to be very interesting.
Doing the experiment this way allows you to see every step of the embryo’s development process in a very cool way if you are into biology or not. It amazed me to know that the shell is after all just a protective casing for the chick to be protected in.
It’s amazing how life happens and springs out of something that looks small, simple and insignificant.
http://youtu.be/am3iGHDnJHc