On 26 April 1986, reactor number four at the Chernobyl Nuclear Power Plant blew up. Forty-eight hours later the entire area was evacuated. Over the following months there were stories of mass graves and dire warnings of thousands of deaths from radiation exposure.
Yet in a BBC Horizon report screened on Thursday, a number of scientists argue that 20 years after the accident there is no credible scientific evidence that any of these predictions are coming true.
The anniversary of the world`s worst nuclear accident in April saw the publication of a number of reports that examined the potential death toll resulting from exposure to radiation from Chernobyl.
