Birds do it, and bees do it. Indeed, researchers estimate that over 99.9% of eukaryotes reproduce sexually. What, then, are the true costs and benefits of sex? Yet again, this simple example ...

The staggering array of modern dog breeds is typically traced to the Victorian era. But half of all canine variation was in place roughly 10,000 years ago, a new study suggests. By Emily Anthes As a ...

This question originally appeared on Quora. Answer by Suzanne Sadedin, Ph.D. in zoology from Monash University: Lifespan in general is determined by trade-offs between survival and reproduction.

COLLEGE STATION -- When the Texas A&M University researchers who gave the world its first cloned bull announced plans to clone cats and dogs they were deluged with requests to duplicate favorite pets.

Purebred puppies from the same litter tend to look pretty much the same. But a trio of littermates born recently in Korea don't just closely resemble each other — they're clones that share nuclear DNA ...

A court in the canton of La Unión in Cartago province sentenced a man this week for illegally breeding dogs in a puppy mill. Prosecutors at the trial were able to demonstrate that the defendant was ...