Gallery: Amazing Natural Packaging: Eggs – What Makes Them So Tough Any...

 

However you feel about eggs – love ’em fried with onions, hate ’em in anything, or are morally opposed to consuming them at all – one thing you can’t argue about is that they are an incredibly effective package for embryonic animals of all kinds. They are so successful, in fact, that female animals as diverse as birds, fish, reptiles, and amphibians all evolved eggs to mature their young outside their bodies, which presents a number of evolutionary advantages (and some disadvantages; namely that mammals, especially, like to eat eggs).

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