Ants - learning from the collective

http://news.bbc.co.uk/2/hi/science/nature/4319739.stm

"What's really gorgeous about this is that the ants that are unburdened, that are running out to the swarm-front to find new prey-items, can run more quickly because they're not carrying anything, and they form two express lanes on either side of the main trail, whereas all the ants coming back with food take a central lane."

"It seems that ants are not just dumb miracles of evolution - they can learn from experience.
When you destroy their nest and make them migrate to a new one, they manage it very efficiently, as you would expect.
If you repeat the exercise next day, they achieve the same thing - but this time they do it even faster. Now that's scary."