There Is No Known Evolutionary Rule for Animal Intelligence
anoles, brain circuits, crab, endothermy, Evolution, fish, Gordon M. Burghardt, intelligence, lizards, mammal behavior, monitor lizards, Neuroscience & Mind, New York Times, Nicholas Humphrey, octopus, reptile behavior, reptiles, Sentience: The Invention of Consciousness, warm-bloodedness
Got a pet lizard? Good news. Scientists say it can be trained to do tasks and tricks. Source