Strong immunity may play a key role in determining long life, but may do so at the expense of reduced fertility, a Princeton University study has concluded. An 11-year study of a population of wild ...

CAMERON – Bystanders waited expectantly for an explosion of horns and hooves as the trailer gate swung open, revealing a new world to the animals within. And then… nothing. Slowly, a nose poked out as ...

In the first evidence that natural selection favors an individual's infection tolerance, researchers from Princeton University and the University of Edinburgh have found that an animal's ability to ...

PALMER — Four Dall sheep from the Talkeetna Mountains and two Kenai Peninsula mountain goats just made unfortunate Alaska history. The animals became the state's first wild sheep and goats to test ...

Rocky Mountain big horn sheep. George Wuerthner. Bighorn sheep acquired their name for the large circular horns of the mature rams. They are strongly associated with mountain terrain, particularly ...

ROCKY BOY’S RESERVATION, Mont. — For the herd of bighorn sheep, the rocky cliffs were a safe place, with 360-degree views and plenty of nooks to blend into the gray rocks. The ground was sprinkled ...

Strong immunity may play a key role in determining long life, but may do so at the expense of reduced fertility, a new study has concluded. Strong immunity may play a key role in determining long life ...