There's an old joke about lab rats in which the teller says he or she secretly suspects that all lab rats are prone to cancer and so all research about the risk of cancer in humans based on tests in rats is likely useless.
The Committee for Independent Research and Information on Genetic Engineering, a European-based research group, thought it would look into such a possibility.
Last week the group released its findings and that joke became a reality. The diet fed to most lab rats is so laced with pesticides, heavy metals, genetically engineered feed and other man-made contaminants that lab rats worldwide are indeed at much higher risk of developing cancer and other diseases and disabilities just from the food they are reared on.