[hexag1]

The fluke worm is a tougher puzzle. The difficulty is twofold. The first question is
did the lancet fluke invade the ant first and then move on to invading the cow?
Or was it alread invading the cow before natural selection stumbled upon the fast track
to the cow's body through the ant? I dont know enough about the situation to know which,
but considering how many other worms and stuff infect cows intestines, I would hazard that
it was infecting cows first.

If we assume that the fluke first infected cows, then the second question is: how did the
worm take over the ants brain? Natural selection cannot have just stumbled upon the answer
on the first try. It had to have been infecting the ant or otherwise been riding along
with the ant profitably before evolving the ability to change the ants behavior. What was this
advantage? I dont know the answer, but my guess is that some expert can find a related fluke, midway
through the same evolutionary pathway that our worm did, and infecting the ant without affecting its
behavior.