How Fake News Goes Viral

ImageImages posted on Twitter by a marketer in Austin, Tex., the day after the presidential election. Eric Tucker, a 35-year-old co-founder of a marketing company in Austin, Tex., had just about 40 Twitter followers. But his recent tweet about paid protesters being bused to demonstrations against President-elect Donald J. Trump fueled a nationwide conspiracy theory …

What’s organic? A debate over dirt may boil down to turf

At issue is whether produce that relies solely on irrigation to deliver nutrients to plants — through what is known as hydroponic and aquaponic systems — can be certified organic If a fruit or vegetable isn’t grown in dirt, can it be organic? That is the question roiling the world of organic farming, and the …