The eggs of amniotes - mammals, reptiles and birds – come in a remarkable variety of shapes and sizes. Evolutionary biologists have now addressed shape variety in terrestrial vertebrates' eggs, ...

Birds lay eggs of surprising variety, and scientists have long wondered why. Could it be that certain shapes protect eggs from shattering? Or perhaps allow them to fit snugly in a nest? Or was ...

Scientists may have just cracked the mystery of why bird eggs come in all shapes and sizes: it has to do with the bird’s ability to soar up in the sky — and the body changes wrought by years of ...

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