There is a white Substance and a yellow Substance, covered by a Shell

…and modern scientists should very easily be able to duplicate all this.

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Without the basic principle of soul, the body cannot be produced. So-called scientists have tried in many ways to produce a living body in their chemical laboratories, but no one has been able to do it because unless the spirit soul is present, a body cannot be prepared from material elements. Since scientists are now enamored of theories about the chemical composition of the body, we have challenged many scientists to make even a small egg. The chemicals in eggs can be found very easily.

There is a white substance and a yellow substance, covered by a shell, and modern scientists should very easily be able to duplicate all this. But even if they were to prepare such an egg and put it in an incubator, this man-made chemical egg would not produce a chicken.

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https://prabhupadabooks.com/sb/10/3/18