This image from a Seralini et al. 2012 study in the journal Food and Chemical Toxicology shows female rats with mammary tumors that purportedly grew after being fed genetically modified food with and without Roundup herbicide. The study's publisher, Elsevier, announced a retraction of the research Nov. 28, 2013, saying the research cannot draw meaningful conclusions between GM corn and health risks in rats. Food and Chemical
http://www.cbsnews.com/news/study-on-genetically-modified-corn-herbicide-and-tumors-reignites-controversy/