The Lost Penis Enigma

The video explores the evolutionary history of amniote penises, highlighting their diversity and the question of whether they arose through convergent evolution or from a common ancestor. Evidence from embryonic development, including the presence of penis nubs in birds and tuataras, supports the hypothesis of a common origin. This suggests that a shared ancestor passed down the genetic blueprint for penis development, which some species retained while others lost.

What evidence suggests that all amniotes may share a common origin for their penises?

In what ways do the diverse reproductive structures in amniotes reflect their evolutionary history?