Cleanup in aisle three...

Here's a fascinating fact - if you were the last human being on a post-apocalyptic highly radioactive earth, and you had found sanctuary in your local Asda or Tesco (which miraculously is hermetically sealed and not radioactive), how long do you think you could survive on the food and drink in there? Well. somebody has done the calculations for you, and reckons there would be enough non-perishable provisions in there to last you - wait for it - 55 years!  Of course, you would almost certainly have gone mad well before then!