All modern-day pooches, from beefy Newfoundlands to scrawny Salukis, are descended from an ancient population of domesticated gray wolves. Despite the 20,000 or so years that have passed since, a new ...

Get any of our free daily email newsletters — news headlines, opinion, e-edition, obituaries and more. Recently, the Chronicle ran a "fairy-tale" story concerning the progress of the reintroduction of ...

Epicyon haydeni, or Hayden’s bone-crushing dog, roamed North America between 12 and 6 million years ago during the middle to late Miocene epoch. Its fossils have been discovered in at least 12 ...