For our final tribute to teachers, we're focusing on creatures -- today we visit the animal kingdom to see what learning looks like there.
Dolphins: Spongeworthy Under the Sea
Using tools was once thought to separate humans from primates, but now, it doesn't seem to distinguish us much from dolphins, either. Recently, scientists observed dolphins using sponges to protect their sensitive schnozzes while searching for food on the rough sea floor. Not only that, but they also appear to be... READ ON