In a secret location in the United States, two white wolves are lounging in the grass in a sunny, roughly one-acre enclosure. It’s early spring and a chill wind blows through bare trees nearby. The ...

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 ...

Editor’s Note: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet Initiative has ...

(CNN) — A species of wolf that died out some 12,500 years ago lives again as the “world’s first successfully de-extincted animal,” according to Dallas-based biotech company Colossal Biosciences.