Mathematicians and fans of unusual natural occurrences can celebrate 11/23 as Fibonacci Day, based on the first four numbers of his historic sequence November 23 might not sound like a day to ...

Why do pineapples, pinecones, and petal counts align with a medieval math riddle? Some see fingerprints of the divine—others, just a cosmic coincidence wrapped in spirals. As Fibonacci numbers stretch ...

An unusual arrangement of leaves in a 407-million-year-old fossilized plant is complicating scientists’ understanding of plant evolution. Most land plants living today have spiral patterns involving ...