Take a cow. Chop it into pieces. Sell the edible bits to supermarkets, ship its hide to a handbag factory, send leftover bones and organs to a rendering plant. Now, what's left? In most of the developed world, the answer is simple: pet food.

The sinew, gristle and fat regarded as unfit for human consumption are taken away by Mr Pedigree Chum and turned into something the salmonella-resistant stomach of your average Labrador will find vaguely digestible. But in America, they do food differently.

Here, in the land of GM corn, 26 per cent obesity and a government which classifies pizza as a "vegetable", scientists have discovered a way to turn bacteria-ridden scraps from the abattoir floor into a substance called "pink slime", which is then sold to unwitting consumers of hamburgers, tacos and other beef-based junk products. 

Read the story on the Independent.