How the Egg Came First

The video explores the discovery of the platypus and its evolutionary significance as an egg-laying mammal. It delves into the history of egg evolution, highlighting the transition of tetrapods to land and the divergence of amniotes into sauropsids and synapsids. The video also discusses the challenges in tracing the evolution of eggs due to the 'egg gap' in the fossil record. Finally, it examines how mammals evolved from laying eggs to live births, possibly influenced by viral DNA integration.

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