On a fenced U.S. preserve, a pair of heavy‑boned canids now stalk and play that, until recently, existed only in tar pits and textbooks. Colossal Biosciences says these living pups carry the signature ...

Let’s start with what should be obvious: The wolf pups are not dire wolves, and they haven’t been “de-extincted.” The fluffy white canines — Romulus, Remus, and Khaleesi — unveiled this week by ...

Colossal Biosciences claims it has revived an extinct species, but scientists outside the company are skeptical. Somewhere in the northern US, drones fly over a 2,000-acre preserve, protected by a ...