Amazingly, the perfectly preserved skeleton of the ferocious dinosaur included the braincase, enabling a precise reconstruction of its gray matter. Stunning computer images reveal regions involved in coordination: sight, smell, intelligence, and even reproduction.

The remarkable discovery sheds fresh light on the evolution of the biggest land animals that ever lived.

"The brain is a window into its behavior — and intelligence," paleontologist Dr. Rodrigo Muller, of the Federal University of Santa Maria, tells South West News Service.