The Ants Go Marching

I was going for my walk this morning, and found myself having to cross a couple of highways: ant highways, to be exact. There they were, hundreds, if not thousands, of little black ants, marching on a path not more than a centimetre or two wide all the way across the road (I measured – six metres, or 25 feet).

I saw the first Ameisenbahn on my way up the hill. A little further, there was a lone ant walking about the road, looking a little lost. Ten minutes later, when I came back down, there...