The theory I read was of homo aquaticus, the aquatic ape. This is
mentioned
in Crawford and Marsh's "Nutrition and Evolution" in which they quote
another author. N & E is a great book for very advanced readers. Not
your
mums and dads stuff.

Homo aquaticus explains is supporteed by our skin and also by our
subcutaneous fat which apparently has more similarities with the
dolphin
that htne chimp. Makes you think that maybe dolphins are the other
branch
of homo aquaticus that decided to stay in the sea. N& E says dolphins
only
branced off some 5 million years ago.

Homo aqu explains how we initially got the huge amounts of omega 3
needed
to keep such a huge brain going. There just ain't no good substitutes
for
omega 3, although mammals can use a lot of omega 6 (arachadonic acid)
in
their brains. I don't know why it's so. Probably got to do with the
fact
that the electromagnetic flux across a nerve cell membrane is more
than the
flux across the most powerful high voltage lines in the electricity
grid.
Them nerves are such tiny suckers that although the voltage change is
only
millivolts, the membranes are so thin that when you divide the voltage
by
the distance you get a huge electromagnetic flux. Forget the smart
drugs,
have a sardine if you wnat to boost your brainpower.

Ben Balzer