Re: Humans and the tsetse fly

On 10/10/2010 00:29, RichTravsky wrote:

As is well known, humans are liable to become
ill as the result of infection by the tsetse fly:

"As it turns out, the Boni-Dodori forest is infested with
sleeping sickness, a parasite transmitted by the tsetse
fly, so herders and other people have left it well alone
for the most part,"

But human ancestors are supposed to have originated
and been living in such places for the past few million

Obviously, that theory is wrong.

No. Why would it be wrong? Groups move around over time.

ALL species (i.e. ALL species) that live in,
or near, tropical forests in Africa have, over
the millions of years in which they evolved,
become habituated to the tsetse fly and the
diseases it transmits.

Humans have no such adaptations. Their ancestors
did not live in such locations.

Range of the fly:

Groups move in and out of that area...

All species that live in that area, or which
'move in and out of it', have built up
immunity to the diseases transmitted
by the tsetse fly. Humans have no such

There is only ONE reasonable conclusion.
Their ancestors did not live in that region,
nor 'move in and out' of it.

There is only ONE reasonable conclusion: not staying
long enough to build up the immunity.

Sure -- and unlike every other known taxon,
the hominid line is unique. Its species
constantly shuffle from one habitat to

To a PA person that's 'reasonable'.

It's a nice illustration of my dictum that
PA has yet to grasp the concept of niche.