A new discovery has identified the oldest known dog, significantly extending the timeline of canine appearance by 5,000 years and contributing to the ongoing study of dog origins from gray wolves.

More than half of the gray wolves released into Colorado since 2023 as part of a reintroduction program have died, raising concerns about the program's success.

Efforts are underway in California to protect wildlife, including mountain lions and gray wolves, as human development encroaches on their habitats. A new freeway crossing aims to aid animal migration.