Archaeologists excavating at the foot of the Aztecs’ Great Temple, in downtown Mexico City, discovered a dazzling collection of gold artifacts and the skeleton of a juvenile wolf. Occupying a ...

SILVER CITY, N.M.— In the first documented instance of the U.S.-Mexico border wall separating two endangered wolf populations, a Mexican gray wolf — likely in search of a new home and mate — was ...

In 1950 the Fish and Wildlife Service began sending poison to Mexico, and staff to set up a wolf-poisoning program, as a form of foreign aid. After the Endangered Species Act was passed in 1973 and ...