But the DNA findings say differently. All modern dogs are descendants of wolves, though this domestication may have happened twice, producing groups of dogs descended from two unique common ancestors.

For more than a century, English Springer Spaniels have proven invaluable to huntsmen as loyal gun dogs that sniffed and flushed out their quarry.

Their goal: to cultivate dog blood in the laboratory, a world first. Artblood, a young bioengineering company, has partnered with two South Korean universities to tackle this challenge: producing ...