Naomi Oreskes

Naomi Oreskes addresses scientists at the annual AAAS Conference in Boston. (Janice Cantieri/MEDILL)

Northwestern University
Harvard historian Naomi Oreskes urged hundreds of scientists to step beyond the objectivity of their data and embrace the riskier role as “sentinels” for scientific facts.
Joshua Jackson climate extremes ecological threat

Joshua Jackson, researcher at the University of North Carolina, Chapel Hill, explained that heightened ecological threats like drought or famine could lead to more intolerant societies with stricter cultural norms. (Janice Cantieri/Medill)

Northwestern University
Rising extremes of droughts, floods or food shortages can reduce a country’s political stability and cultural tolerance, warned scientists at the American Association for the Advancements of Science conference in Boston.