Dec. 17, 2024 — Scientists have discovered the oldest known animal with saber teeth: a predator that lived 270 million years ago. This animal, from before the age of the dinosaurs, was a dog ...
January 12, 2025 • In a mass extinction event some 40,000 years ago, Australia lost 90% of its large species, including nearly two dozen kinds of kangaroos. Two theories suggest why.