Burgers contain rat and human DNA, study finds A study of 258 burgers in the US finds unexpected additional – and lack of – ingredients

Upon ordering a burger in a fast food chain, diners might have already come to terms with the fact there is a very slim chance of horse meat lurking under that tomato. 
READ MORE:http://www.independent.co.uk/news/world/americas/burgers-contain-rat-and-human-dna-study-finds-a7023661.html