RICHARD BEECH PHOTOGRAPHY / SCIENCE PHOTO LIBRARY RICHARD BEECH PHOTOGRAPHY / SCIENCE PHOTO LIBRARY
Ammonite fossil found in Charmouth, Dorset, UK. The fossil dates to the Jurassic period and is approximately 200 million years old. Ammonite shells are a naturally occurring example of the Fibonacci sequence, a list of numbers where every number is the sum of the previous two.
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