Horizon: The Day We Learned to Think

The relevance of archaeology to our understanding of ourselves is uncovered in this enlightening tale of the discovery of a small stone in an African cave. The object has revolutionised scientific understanding of the evolution of sophisticated thought. The little knob of ochre appears to be a work of abstract art, yet is twice as old as humanity - evidence, perhaps, that the Neanderthals were far more advanced than previously supposed.