In this book, you will witness the scien tific studies, discoveries and/orinventions of Thabit ibn Qurrah, themost important mathand astronomy scholar of the ninth century. Thabit ibn Qurrah, who is known as the Turkish Euclid in the West and who found the differential calculation earli erthan Newton, found calculus, a branch of mathematics. He went down in history as a scien tist calculating the length of theequator. How about setting out on an exciting time travel togetto know Pioneering Scientist Thabit ibn Qurrah better?