The Fibonacci Numbers Found in Nature (IMAGE) Prometheus Books Caption These pinecones have eight spirals in one direction and thirteen in the other direction. These are both examples of Fibonacci numbers. Credit From: The Fabulous Fibonacci Numbers (Prometheus Books, 2007). Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.