In 1997 a 15 million year monkey skull was discovered, and for the first time researchers have peered inside to see what secrets it holds. What they found was surprising -- the brain was small but very complex. The skull comes from an ancient monkey known as the Victoriapithecus, and it was examined using X-rays and a 3D computer model based on the X-rays. The brain is said to have been “tiny” in relation to the monkey’s body size, coming in at more than 50-percent smaller than comparable modern monkeys. The level of complexity, however, was surprisingly high.