These creatures seem to be straight out of a nightmare but, if we may paraphrase, nature is stranger than fiction. Throughout Earth's history, there have been five mass extinction events that have ...

Every state in America has its own local legends, and thanks to Barbara Davidson, we now have an illustrated guide to the most well-known mythical creatures lurking in each one. From Bigfoot’s many ...

A spiky, armor-plated "walking tank" with bulging eyes, a shield on its butt and a head like a Swiss army knife scuttled along the seafloor more than 500 million years ago, snapping up prey with a ...