9 Ravens : Scientists have recently discovered that Ravens are incredibly intelligent creatures, and may be on par with chimps. This is fascinating because many people believed that an animal with such a small brain wouldn’t be able to compete with animals that have much larger brains. In reality it’s not the size of the brain that matters but the neural density, and brain structure. Scientists can test the intelligence of animals by testing their inhibitory control, which is the ability for animals to use reason to solve problems instead of following instincts. Many animals were presented with a transparent tube with food inside, and two openings on each side of the tube. Most animals started trying to get the food directly, and only hit the barrier. Ravens on the other hand, chose to enter the tube from the side openings.