A famous 300-million-year-old fossil that was thought to be the world's oldest octopus—even featuring in the Guinness Book of ...

Scientists thought the fossil showed eight arms, fins, and other features typical of an octopus, pushing back the known ...

Our planet is several billion years old—a number so vast it’s almost impossible to truly comprehend. In all that time, ...

The brilliant iridescent hues found in ammolite come from tiny air gaps in the fossils’ layers, a new study finds. By Alexa Robles-Gil Millions of years ago, squid-like creatures called ammonites swam ...