A century ago, there was an amphibious creature called the Anthropus.
Not human, but able to speak.
It's not a crocodile, it has gills.
A century later, the hominid became extinct.
Those who abandon wisdom and retain instincts evolve into deep-sea creatures and never see the sun.
Those who insist on retaining the ability to think and walk upright will perish and be reincarnated as humans.
Conception: