Chuckwalla National Monument was established by outgoing President Joe Biden as one of his last actions to help restore endangered desert tortoise habitats.

Tuesday morning in California's Mojave Desert, the Boom Supersonic XB-1 — the world's first independently developed supersonic jet — broke the sound barrier during a test flight. The aircraft, piloted ...

nearly two-thirds of which is critical habitat for the endangered Mojave Desert tortoise and the desert pupfish. The new monument houses The Chuckwalla Bench, one of the most intact tortoise ...