Obesity in Canada has doubled in less than 30 years. 59 percent of Canadians are now either overweight or obese. A small group of scientists have begun looking beyond the obvious because of a group that can’t chew, let alone jog. Infant obesity rose more than 70 percent in just 20 years. You can’t blame them for unhealthy lifestyles. The scientists suspect that, starting in the womb, man-made chemicals may be triggering changes to our metabolism that result in lifelong weight gain.