"Oregon's once decimated gray wolf population has rebounded to at least 77 animals, and the wolves are now pairing off and breeding across a wide region, state officials with the state's Department of Fish and Wildlife said on Wednesday."

"For some animals, there’s no such thing as a dog-eat-dog world. They rule."

"The strandings of a record number of sea lion pups along the California coast this year are linked to a puzzling weather pattern that has warmed their Pacific Ocean habitat and likely impacted fish populations they rely on for food, federal scientists said on Wednesday."

"Gray wolves in the western Great Lakes region are protected by federal law once more."

"Working late in a tiny Arkansas lab, Susan Wilde found herself alone with a killer."

"Scientists believe the dwindling axolotl, or Mexican salamander, holds secrets of aging and regeneration"

"For the past five weeks, volunteers have been desperately trying to nurse back to health more than a hundred sea lions found stranded along the state's beaches in a mystery that's threatening one of California's most lovable sea creatures."

"The number of imperiled wolves found only in the American Southwest climbed to 109 in 2014, marking the fourth consecutive year that the population of Mexican gray wolves has risen by at least 10 percent, federal wildlife managers said Friday."

"A federal judge has granted two animal protection groups a unusual preliminary injunction to stop the Bureau of Land Management’s roundup of more than 330 wild horses in northern Nevada, saying the government cannot rely on a five-year-old environmental analysis that ignores claims the herd would be harmed by a pesticide given as a form of birth control."