Because the quail builds her nest and sets on her eggs on the ground, so they must all hatch at the same time. Not until the entire dozen or so are laid, does the mother quail begin setting. Why does she wait until then? Who told her to do this? However, all the eggs do not develop at the same rate. Yet all hatch out at the same time. Scientists eventually discovered the cause. The faster ones click in their shells to the slower ones, and that causes the slower ones to speed their development! Everything in nature is a continual amazement.
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