A brilliant series of reconstructions of life in the deep past, richly imagined from the fine details of the fossil record ...There are passing hints of how particular fossils were formed, and why specific locations yielded a rich haul, but the details are passed by – if you wan that kind of thing you will have to follow up the extensive notes. The exposition is also mercifully light on the cliches of Attenborough-style narration, where every scene seems to be either a mating opportunity or a meal.