Researchers showed that only the right-brain side of the amygdala is involved in processing images of animals—in terms or fear, aversion, or affection—highlighting the importance animals throughout ...

Unlike the octopus's arms, which that animal often uses to move and carry ... The cuttlefish has one of the largest brain-to-body size ratios of any invertebrate, perhaps even larger than that ...

Evidence for this function first came from studies of the organ's anatomy and its nerves as well ... this feature is unknown in any other extant animal. With the aid of the intracranial joint ...

“We don’t have a precise definition of a brain,” he said. Scientists home in on the brain’s evolutionary origins by sorting out the animals without brains. Sponges have no neurons, so they are easy to ...

For animals like crocodiles, brain matter occupies only 30% to 50% ... is more consistent with previous understandings of dinosaur anatomy and intelligence, he said. “I am delighted to see ...