The wilds of North America can be a hazardous place. It's there that some of the most intimidating predators make their home – black and brown bears that could eviscerate a person with one swipe of a ...

Big cats have a big impact. A long-term study showed that when mountain lions began regular visits to a small suburban preserve about 45 miles (72 kilometers) south of San Francisco, they changed the ...

A notorious predator may be responsible for making California’s roads safer. In a new study published this week in Current Biology, researchers found that the odds of a vehicle colliding with a deer ...

A surprising ecological makeover unfolded when mountain lions began frequenting a small preserve south of San Francisco. Deer activity dropped, plants recovered, and shifts among predators like ...