The Fibonacci sequence is a series of numbers where each number is the sum of the two preceding ones. It starts with 0 and 1, so the sequence begins as 0, 1, 1, 2, 3, 5, 8, and so on. This pattern continues infinitely, and it can be found in various aspects of nature, such as the arrangement of leaves on a stem or the branching of trees. This sequence was introduced to the Western world by the Italian mathematician Fibonacci in his book "Liber Abaci" in 1202. The numbers in the sequence are not just mathematically interesting; they also appear in art, architecture, and even in the stock market, showcasing the beauty of mathematics in everyday life.