Re: AAH: humans long-distance runners?

Phillip Bigelow (
Wed, 14 Dec 1994 19:47:28 GMT

Pat Dooley <> writes:

>Every savannah animal except for some very high mass
>animals has a fur coat to keep them insulated.
>Pat Dooley

Your side has no modern-day anologue to an aquatic ape. Name a _mammal_ the
size of A. afarensis (about four feet tall and slight of build) or smaller
that is semi-aquatic and is _hairless_. Just one modern-day example will
do. You won't be able to, because small endotherms need fur to keep warm.
Their surface area/mass ratio is too high. A small aquatic ape is
phyiologically impossible. Water saps body core heat even faster than air
does. I provided a list of scientific papers that discuss endothermy in
small mammals. If those papers are unavailable, then read the chapter in
Robert Bakker's book _The Dinosaur Heresies_ on metabolism and size (chapter
I can't believe this physiological fact hasn't been
accepted yet.