'Natural' substitute an advertiser's dream
                                
                                
                                    (Newser) -
                                    The arrival of stevia, a new artificial sweetener approved by the FDA in December, will likely upend the fake-sugar market, the New York Times reports. Sweet ’N Low, Equal, and Splenda have fought to stalemate of sorts, but stevia brings a huge advantage: Because it comes from a plant,...