A pioneering effort to restore a species to the wild continues, even as floodwaters rise and scientists debate the animal’s genetic heritage.
Deciphering the link between nature and nurture
Allergies, autoimmune disease, and the hygiene hypothesis
Threatened by pollution and climate change, the future of Earth’s largest inland body of water is in the hands of five bordering nations.
It's a banner year for snowy owls
Caves are among the predators’ favorite spots.
The brain doesn't much care whether an experience is real.
The secret, social lives of bacteria
Centuries of astronomy, plus video-game technology, offer a stunning new perspective on our place in space.
Why do some female bovids have horns, whereas others don’t?
Peaks protected fifty years ago by the Wilderness Act no longer keep mountain goats safe from human impact.
By the 1920s, California had lost all of its grizzly bears—once considered a distinct species and an emblem of the state.
Preconceptions skew our view of the biggest killer in the developed world, atherosclerosis.