Ant colony discovered in an abandoned Polish nuclear weapons bunker
It's interesting that given the collective problem solving skills of ants, that they are apparently unable to figure out not to fall into a hole.I wonder if they just fall through by random chance, or if there was some ant at some point that left a "hey guys, there's food down here" pheromone trail, and all the ants that came after just reinforced it into an ant super-highway.  If no one ever comes back to say "actually, there isn't any food down there, just an inescapable pit", then I guess ant logic says there must still be something good down there.