I've got ant problems - lots of 'em - coming from every orifice (in my house). Googling for some 'intelligence' on how the little blighters' minds work so I might better exterminate them I stopped for a moment when I read this heartening tale about the guts and determination of the average ant...
http://www.adventurejournalist.com/notebook/archives/001005.html
I then promptly moved on and started looking for more and ingenious ways to get rid of them for good so I wouldn't have to continually feel (slight) guilt whenever I squash one.