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A very interesting and educational experiment was done by students in Japanese school, in order to hatch an egg without shell. Broken shell of a fertilized egg and threw its contents at a plastic membrane. Then put in a bowl and inside an incubator, leaving nature to do its magic.
The 3rd day, It seems that the heart of the chick has already formed and the 5th day we see better the fetus to develop. After 21 days, born a completely healthy chick until we see walking in the laboratory. It is not known if this is the first time that this experiment is successful, but the fact that used transparent material in the implementation, He allowed his disciples Professor Tahara admire the creation of a new life minute by minute.
My question is about calcium for the embryo, since this one comes from the shell.