Galileo is not the native of Pisa to make important advances in mathematics and science. In the twelfth century, Leonardo of Pisa (Leonardo Pisano) reintroduced decimal mathematics into medieval Europe and described the “golden ratio,” the mathematics underlying what is commonly known as the Fibonacci Spiral. Laetitia apologizes for the tortured rhyme of the limerick.
Less known than Pisa’s Galileo
Is its son Leonardo Pisano,
“Fibonacci” by name
Of decimals fame
And the spiral based on the gold ratio.