Here's a cool little video I found out about via e-mail. It seems some of the dolphins at SeaWorld (in Florida, I think) have learned to blow bubbles, shape them into perfect rings, and play with them as if they were toys. They seem to do this for their own amusement and for the pleasure of tourists who watch them. What's more, the dolphins who've learned how to do this appear to be teaching the others who haven't yet mastered the trick. Fascinating stuff.