"Sightings of these prehistoric giants have been reported in the wetlands at Roger Williams Park Zoo," the zoo said in announcing the exhibit's return. "Have these ancient creatures taken up residence ...

Colossal Biosciences achieves a scientific breakthrough. They bring back the dire wolf from extinction. Using genetic ...

Some question whether the pups are really dire wolves, or just genetically tweaked gray wolves. But the technology could be used to help at-risk animals.