Historical event

Evolution of Amniotic Egg

Date: about 340 Million Years Ago

The evolution of the amniotic egg, which allowed vertebrates (amniotes) to reproduce on land without needing to return to water, leading to the diversification of reptiles, birds, and mammals.

Tags: amniotic egg, evolution, amniotes, reptiles, mammals, birds, terrestrial reproduction, paleontology, carboniferous

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