The Incredible Egg (encore)
Gastropod
The History of Eggs
Eggs have a really specific role, and that's simply to nourish and protect the growing chick up until it hatches. Different species of birds have completely different amounts of pores and pores of different sizes. The egg white provides water to the chick as it grows. It is also a barrier so that if any microbes come down those pores, the microbes have got to cross this kind of albumin barrier.
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