This week we've dug up three bona fide scientists to talk about what fossils tell us about the past. Dr David Norman, the director of the Museum of Earth Sciences at Cambridge University, discusses the science of dinosaurs, Dr Tamsin O'Connell from Cambridge University describes how isotope markers in ancient bone and hair can tell us what animals were eating, and Dr Paul Willis from Sydney, Australia, talks about how new crocodile fossils help us understand crocodile evolution. In the first of our series on how Einstein has influenced our everyday lives, Philippa Law has a laser-sharp look at how a CD player works. Listen Now
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