And perhaps the advantages of this gradient extend up as far as aquatic apes.

Not sure what this means.

I assume they are referencing the long-debunked theory that man evolved from a line of apes that became semi-aquatic for a while.

	▲	euroderf a day ago \| parent [-]
		Yup that's where I was aiming. Is it thoroughly debunked ? It's a cool idea.