Brief History

One of the most famous mathematicians in the Middle Ages was Leonardo Bonacci. He was also known as Fibonacci. He made a list of numbers that you can find in nature and physics. Leonardo was born in Italy. He went to North Africa with his father. There he learned about the Hindu-Arabic numbers. They were better than the old Roman numbers. In 1202 Leonardo wrote a book called «Liber Abaci». He told people about the new numbers and his famous list.

His list starts with 1, 1, 2, 3, 5. To make the next number, you add the two before it. For example, 5 3 8. He used his list to explain how rabbits grow. If one rabbit has babies, the next month there will be two. Then there will be four, then eight, and so on. There is a special number called the Golden Ratio. It is about 1.6. You can see it in trees, berries, and galaxies. We celebrate Fibonacci Day to remember him. We can use his list to count things. We can count animals, plants, and weather. Even galaxies are counted with it.

How to Celebrate

Fibonacci Day celebrations vary across the globe. Some people organize lectures, workshops, and exhibitions on Fibonacci's life and work. Others plant plants or trees to observe the Fibonacci spiral in nature. Some people just share information about Fibonacci and his achievements on social media.

Fibonacci Day

Interesting Facts

• The Fibonacci sequence is a series of numbers in which each number is the sum of the two preceding numbers (1, 1, 2, 3, 5, 8, 13, etc.).
• This sequence can be observed in nature, such as in the arrangement of leaves on a stem or in the growth of sunflowers.
• The Fibonacci sequence has applications in various fields, including art and music. It can be used to create melodies and harmonies.
• Fibonacci numbers are also used in computer graphics and animation to create realistic movements.
• The Fibonacci spiral is a pattern that can be seen in nature, for example, in the arrangement of seeds in a sunflower head.