> At the end of all things, when evolution has reached its inevitable end, all that will be left is a war between ant eaters and crabs.

From reading the aritcle, it seems that ants are really crappy as an energy source:

  One thing myrmecophages share is an almost insatiable appetite — ants and termites are so low in energy that even a small animal like the numbat must eat about 20,000 termites a day

I think this explains why Anteaters spend most of their day doing nothing but sleep -- they barely get enough calories from eating ants.