Dr. Duckworth, a psychologist, is the author of “Grit” and the forthcoming book “Situated: Finding the People and Places That Bring Out Your Best.” There is a children’s story I used to read to my ...

Problems with a 25-year-old landmark paper on the safety of Roundup’s active ingredient, glyphosate, have led to calls for the E.P.A. to reassess the widely used chemical. By Hiroko Tabuchi In 2000, a ...