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 ...

A photograph of Asha from February 2023 shows her in a “capture box” at the Sevilleta National Wildlife Refuge in central New Mexico. This was the second time the endangered Mexican wolf, tagged F2754 ...