Exchanges at the Frontier: The Search for Neanderthal Genes

From his early work with Egyptian mummies to his breath taking achievement of sequencing the genome of our nearest ancient relatives - the Neanderthals - professor Svante Paabo has changed how we think about ourselves. He and his team have found a comparatively small number of changes in the genes between us and Neanderthals, including changes in the brain. Could these differences explain what makes us human?