(NOTE: Statements in this talk have been challenged by scientists working in this field. Read "Corrections & Updates" below for more details.) Elaine Morgan was a tenacious proponent of a theory that is not widely accepted. The aquatic ape hypothesis lays out the idea that humans evolved from primate ancestors who dwelt in watery habitats. Hear her spirited defense of the idea -- and her theory on why science doesn't take it seriously.

Elaine Morgan: I believe we evolved from aquatic apes

I believe we evolved from aquatic apes

Discovering the hidden lineage between humans and aquatic existence challenges conventional evolution theories at 262 seconds.

Exploring the notion that our ancestors were more aquatic, shedding light on our naked skin, bipedality, and speech at 527 seconds.

Facing the academic resistance to the aquatic ape hypothesis, a call for open-minded exploration of human origins at 887 seconds.