A mega-study of 117 mammal species reveals that limiting reproduction increases life expectancy by up to 10 percent.

Hammerhead worms are invasive flatworms that reproduce by cloning themselves through fragmentation. With little genetic diversity but powerful regenerative abilities and even neurotoxins, these ...

Inside the growing scientific quest to understand what creatures with the extraordinary ability to defy the ravages of time can teach us about making human aging better.

We all know a few basic laws of nature, like predators hunt to stay alive, prey stay alert to avoid becoming food, and ...

Advances in organ and computer models are raising the prospect that some animal experiments could be eliminated. But there ...

Some animals have reproductive strategies so extreme that they can lead directly to their own death. In certain species, intense mating competition or biological stress pushes the body beyond its ...

The warming world has disrupted the timing for plant and animal reproduction, and it's usually bad news for species that depend on each other — like flowers blooming too early and pollinating bees ...

Amazon mollies don't need a man, and never will. A new study finds they can purge and repair genetic mutations that would otherwise plague a self-cloning species.

Domestic pigs reproduce through a breeding process that is closely managed on farms around the world. During mating, a male pig, known as a boar, mounts the female, called a sow, in a behavior driven ...

Microglia (immune cells) and the RANK protein are essential for triggering puberty and maintaining fertility in the brain.

Even in the ultra-dry Atacama Desert, tiny soil-dwelling nematodes are thriving in surprising diversity. Scientists found ...

After cold winters, invertebrates such as honeybees and paper wasps seem to disappear and then suddenly return in large ...