More than 300 million years ago, long before the age of dinosaurs, there lived a four-legged, clawed creature that had evolved to survive and reproduce entirely on land, away from the shark-swarmed ...

This creature, called Westlothiana lizziae, is one of the earliest examples of a four-legged animal that had evolved from living underwater to dwelling on Earth. It, and other stem tetrapods like it, ...

The fossils of ancient salamander-like creatures in Scotland are among the most well-preserved examples of early stem tetrapods -- some of the first animals to make the transition from water to land.