Presented by Anthony Smith
At least 150 people and countless animals have died in Brazil as a result of a bee-keeping accident in 1957, when a handful of notoriously ferocious African queen bees escaped from a genetics research station near SSo Paulo< Their numbers are rapidly increasing, and a wave of potentially dangerous insects, moving northwards at a rate of about 200 miles a year, has already reached the Atlantic coast of Guyana. How much of a threat are they to the rest of the continent and North America, and how can their spread be halted?
Producer MICHAEL BRIGHT