The Ums and Ahs of Learning - Naked Scientists NewsFLASH - 18.04.11

In NewsFlash this week, how ums and ahs can boost a baby's learning power, how mankind talked his way out of Africa, and how life on land evolved earlier than we thought. Plus, how scientists are viewing schizophrenia in a Petri dish and an insight into how a rider-less bicycle remains upright.