ENID, OKLAHOMA—Workers installing a natural gas line in northern Oklahoma accidentally uncovered the skeleton of a 50,000-year-old mammoth. Archaeologists and geographers from Oklahoma State University involved in a study that aims to reconstruct the prehistoric habitat of mammoths excavated the fossilized remains. “We are really fortunate to be involved in excavating such a find, and the mammoth’s fossilized remains are in very good condition for this type of removal and reassembly,” said Oklahoma State geographer Dale Lightfoot.