To help untangle fact from speculation, scientists have developed a ‘robust null hypothesis’ to assess the odds of a megadrought — one that lasts more than 30 years — occurring in the western and southwestern United States.
To help untangle fact from speculation, scientists have developed a ‘robust null hypothesis’ to assess the odds of a megadrought — one that lasts more than 30 years — occurring in the western and southwestern United States.