Documentary that explores the enduring prehistoric mystery behind the rise and fall of the Neanderthal -- one of the most successful hominids ever to walk the earth. Highly evolved creatures, Neanderthals used tools, created musical instruments and buried the dead with intimate ceremonies. A mix of animation, drama, prosthetics and special effects transports viewers back in time 43,000 years, charting everything from the Neanderthals' rise to their extinction. After 200,000 years, including two Ice Ages, Neanderthals died out suddenly, relinquishing their place to the Cro Magnon -- or so it was previously thought. The program presents the theory that Neanderthals may have interbred with Cro Magnon, long considered to be our ancestors.