Wildlife officials have collared a dozen gray wolves in Northern California in an effort to better understand and manage the species that has made a comeback in the state after being extirpated a ...

In Alaska, a biologist and her family learn how quickly these iconic predators can change the menu — and bend the rules.

Launched in Japan in 1997, the Toyota Prius hybrid made its U.S. debut in 2001 and sold only 15,000 units that first year. By 2011, U.S. sales reached the 1 million mark. The Prius uses a gasoline ...

Eco-Friendly vehicles have a minimum EPA-estimated mileage of 35 mpg combined and include hybrids, diesels and even a few fuel-sipping gas-only cars. May require specific trim level and/or ...