It is interesting that Brian Switek starts his impressive look at our interpretation of fossils with a reference to the way the influence of a TV company called Atlantic Productions had made a scientific paper more like a TV documentary than science – as we had a similar complaint in our review of the book Dino Gangs , also steered by Atlantic Productions , being more like a shallow TV documentary and less like popular science writing. (Switek was also unimpressed by Dino Gangs .) This is a powerful exploration of the way fossil discoveries have changed our understanding of the development of animals, taking us from the old idea of a chain of more and less advanced creatures (so we, for example, were further up the chain than the apes, and where parts of the chain are currently unknown there is a ‘missing link’) to a Darwin-inspired picture of a tree of life on which we are one of millions of twigs, with common ancestors, but rarely a direct connect...