After a decades-long hiatus, new world screwworm populations have surged in Central America and Mexico — and are inching northward.

The Texas Parks and Wildlife Department (TPWD) is urging people in southern Texas to keep a lookout for animals suffering from New World screwworm (NWS), a dangerous parasite that also impacts humans.

Study of rotting human cadavers hints that a puzzling chemical marker in Neanderthal remains could be from eating the larvae. The finding adds to the picture that researchers are painting of how our ...