Naked Scientists Newsflash

A safer way to test for Down's Syndrome and how sponge-swallowing could reveal oesophageal cancer feature in this week's Naked Scientists, along with a discovery that could delay diabetes in obese people and the nanotechnology that may let you climb walls like spider man! Plus, we hear from South Africa about why the bush meat industry is a problem, and how a new meningitis vaccine programme could safeguard millions of people.