Officials from both governments agreed to move forward with the group. But the future of decision-making and cost burden is still unclear.

YELLOWSTONE NATIONAL PARK, Wyo. — A pack of gray wolves returned to their ancestral range in Yellowstone National Park on Thursday, savoring the air of their new home six decades ...

Located 20 miles south of Tucson on the eastern slope of the Sierrita Mountains, the Twin Buttes Mining district dates back to the late 1800s.

Mining was challenging due to lack of water and high transportation costs involving ore shipments hauled by mule-drawn wagons to the main line of the Southern Pacific Railroad at Red Rock.

Database on Refinement of Housing, Husbandry, Care, and Use of Animals in ResearchThis database, created in 2000, is updated every four months with newly published scientific articles, books, and ...