Explore how ancient sloths evolved in size, from small climbers to massive ground dwellers, shaped by shifting climates and ...

T. rex evolved in North America from Asian ancestors. Climate shifts and extinction events helped tyrannosaurids and ...

Bones that are thought to be more than 140,000 years old have been discovered buried in the sea off the Indonesian coast, hinting to a previously unknown population in South East Asia.

Most people are familiar with modern sloths — slow-moving, tree-dwelling mammals that digest food slowly and descend only ...

While the modern world has some big and scary creatures, the truth is that many of those animals are nothing compared to ...