Competing theories explain how dogs came to be domesticated from wolves. Now, a new study adds further support to the idea ...

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 ...