I was shopping yesterday and found these little clusters (see photo) on the surface of an egg. They look like extra shell or a calcium build-up, but if they are, what causes this? If they are deposits of extra shell, why are they formed into these strange clusters, rather than spread evenly over the surface so that the whole shell is thickened?
• Eggcellent question… When the egg is forming in the hen’s reproductive tract, it spends most of its time in the uterus. The uterus contains the shell gland, which lays down calcium carbonate around the outer membranes of the developing egg. While in the…
