"When we think of intelligent creatures, we often think of vertebrates, or animals with spinal columns and relatively large brains. We don't usually think of invertebrates, or animals without a spine. But invertebrates can be astonishingly intelligent. These animals exhibit surprising feats of learning, memory, and problem-solving using their relatively simple, tiny brains--some the size of a sesame seed or even smaller. In fact, some intelligent invertebrates have no brain at all! In Smart and Spineless, readers will be challenged to think in a whole new way about what it means to be smart!"--Publisher's website.