The rib bone of an extinct giant sloth discovered in January at the future Dollar Tree site in Rogersville is now a part of ...

Archeologists in Mexico have found fossils of extinct animals in a cenote in Umán, Yucatán, including those of a giant sloth ...

About 65 million years ago, dinosaurs lumbered through forests. After they went extinct, things changed — and the effects are ...

Twenty years later and the bioengineering company Colossal Biosciences has set its sights on resurrecting the legendary ...

Despite its adaptability and durability, the dire wolf and other great animals went extinct around 10,000 years after the last cold age. Climate change, predator competition, or human hunting may have ...

mastodons and giant ground sloths, Doughty said. They evolved in concert with the species, landscapes and systems of our current world — but then they went extinct. They’re thought of as “re ...