Giant camels used to roam what’s now Los Angeles. If you visit the city’s La Brea asphalt seeps, you can see their bones, ...

A new study has provided fresh insights into how animals such as the woolly mammoth, musk ox and arctic fox evolved to survive the cold during the ice age. A team of paleontologists and ...

Cold-adapted animals started to evolve 2.6 million years ago when the permanent ice at the poles became more prevalent. There followed a time when the continental ice sheets expanded and contracted ...

Today, sloths are slow-moving, tree-dwelling creatures that live in Central and South America and can grow up to 2.5 feet long. Thousands of years ago, however, some sloths walked along the ground, ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Two well-preserved ...