New research suggests that some of the differences between humans and chimpanzees thought to be genetic may in fact be diet related. In a study by German and Chinese scientists, four groups of mice were fed, respectively: 1) normal lab-mice pellets; 2) the same diet as zoo chimpanzees (fruits, vegetables and yogurt); 3) food from the scientist's cafeteria; and 4) all McDonald's diet. The most surprising finding is that mice expressed various genes differently depending on diet; and in the case of some genes showed some of the differences between human and chimpanzee genes thought to be determined by DNA rather than diet. Another likely take-away: The expression of genes, especially in the liver, of vegetarians is likely to differ from the expression of genes in the livers of people who eat a standard American diet. In other news, zoos feed yogurt to Chimpanzees. ; )