There’s new evidence that resveratrol may play a key role in slowing the aging process. Scientists hoping to mimic the life-extending qualities produced by a chemical found in red wine and dark chocolate say they have solved one of the mysteries about how this compound works to combat the effects of obesity, diabetes, certain cancers and a host of other maladies. The findings, published in Friday’s edition of the journal Science, could lay the foundation for a variety of d...