AstronomyIn astronomy the Muslims integrated the astronomical traditions of the Indians, Persians, the ancient Near East and especially the Greeks into a synthesis which began to chart a new chapter in the history of astronomy from the 8th century onward. The Almagest of Ptolemy, whose very name in English reveals the Arabic origin of its Latin translation, was thoroughly studied and its planetary theory criticized by several astronomers of both the eastern and western lands of Islam leading to the major critique of the theory by Nasir al-Din al-Tusi and his students, especially Qutb alDin al-Shirazi, in the 13th century. The Muslims also observed the heavens carefully and discovered many new stars. The book on stars of 'Abd al-Rahman al-Sufi was in fact translated into Spanish by Alfonso X el Sabio and had a deep influence upon stellar toponymy in European languages. Many star names in English such as Aldabaran still recall their Arabic origin. The Muslims carried out many fresh observations which were contained in astronomical tables called zij. One of the acutest of these observers was al-Battani whose work was followed by numerous others. The zij of al-Ma'mun observed in Baghdad, the Hakimite zij of Cairo, the Toledan Tables of alZarqali and his associates, the ll-Khanid zij of Nasir al-Din al-Tusi observed in Maraghah, and the zij of Ulugh-Beg from Samarqand are among the most famous Islamic astronomical tables. They wielded a great deal of influence upon Western astronomy up to the time of Tycho Brahe. The Muslims were in fact the first to create an astronomical observatory as a scientific institution, this being the observatory of Maraghah in Persia established by al-Tusi. This was indirectly the model for the later European observatories. Many astronomical instruments were developed by Muslims to carry out observation, the most famous being the astrolabe. There existed even mechanical astrolabes perfected by Ibn Samh which must be considered as the ancestor of the mechanical clock. Astronomical observations also had practical applications including not only finding the direction of Makkah for prayers, but also devising almanacs (the word itself being of Arabic origin). The Muslims also applied their astronomical knowledge to questions of time-keeping and the calendar. The most exact solar calendar existing to this day is the Jalali calendar devised under the direction of 'Umar Khayyam in the 12th century and still in use in Persia and Afghanistan

Medical Sciences The hadiths of the Prophet contain many instructions concerning health including dietary habits; these sayings became the foundation of what came to be known later as "Prophetic medicine" (al-tibb al-nabawi). Because of the great attention paid in Islam to the need to take care of the body and to hygiene, early in Islamic history Muslims began to cultivate the field of medicine turning once again to all the knowledge that was available to them from Greek, Persian and Indian sources. At first the great physicians among Muslims were mostly Christian but by the 9th century Islamic medicine, properly speaking, was born with the appearance of the major compendium, Rhazes Anatomy Smallpox Antiseptic Psychosomatic Medicine The Paradise of Wisdom (Firdaws al-hikmah ) by 'Ali ibn Rabban al-Tabari, who synthesized the Hippocratic and Galenic traditions of medicine with those of India and Persia. His student, Muhammad ibn Zakariyya' al-Razi (the Latin Rhazes), was one of the greatest of physicians who emphasized clinical medicine and observation. He was a master of prognosis and psychosomatic medicine and also of anatomy. He was the first to identify and treat smallpox, to use alcohol as an antiseptic and make medical use of mercury as a purgative. His Kitab al-hawi (Continens) is the longest work ever written in Islamic medicine and he was recognized as a medical authority in the West up to the 18th century.

The Canon of Medicine and Meningitis

Pulmonary Circulation

Gynecology

Major Hospitals

GeometryThe Muslims also excelled in geometry as reflected in their art. The brothers Banu Musa who lived in the 9th century may be said to be the first outstanding Muslim geometers while their contemporary Thabit ibn Qurrah used the method of exhaustion, giving a glimpse of what was to become integral calculus. Many Muslim mathematicians such as Khayyam and al-Tusi also dealt with the fifth postulate of Euclid and the problems which follow if one tries to prove this postulate within the confines of Eucledian geometry.

Mathematics, Algebra As for mathematics proper, like astronomy, it received its direct impetus from the Quran not only because of the mathematical structure related to the text of the Sacred Book, but also because the laws of inheritance delineated in the Quran require rather complicated mathematical solutions. Here again Muslims began by integrating Greek and Indian mathematics. The first great Muslim mathematician, al-Khwarazmi, who lived in the 9th century, wrote a treatise on arithmetic whose Latin translation brought what is known as Arabic numerals to the West. To this day guarismo, derived from his name, means figure or digit in Spanish while algorithm is still used in English. Al-Khwarazmi is also the author of the first book on algebra. This science was developed by Muslims on the basis of earlier Greek and Indian works of a rudimentary nature. The very name algebra comes from the first part of the name of the book of al-Khwarazmi, entitled Kirah al-jahr wa'l-muqabalah. Abu Kamil al-Shuja' discussed algebraic equations with five unknowns. The science was further developed by such figures as al-Karaji until it reached its peak with Khayyam who classified by kind and class algebraic equations up to the third degree.

PharmacologyIslamic medical authorities were also always concerned with the significance of pharmacology and many important works such as the Canon have whole books devoted to the subject. The Muslims became heir not only to the pharmacological knowledge of the Greeks as contained in the works of Dioscorides, but also the vast herbal pharmacopias of the Persians and Indians. They also studied the medical effects of many drugs, especially herbs, themselves. The greatest contributions in this field came from Maghribi scientists such as Ibn Juljul, Ibn al-Salt and the most original of Muslim pharmacologists, the 12th century scientist, al-Ghafiqi, whose Book of Simple Drugs provides the best descriptions of the medical properties of plants known to Muslims. Islamic medicine combined the use of drugs for medical purposes with dietary considerations and a whole lifestyle derived from the teachings of Islam to create a synthesis which has not died out to this day despite the introduction of modern medicine into most of the Islamic world.

Physics, Projectile Motion, Optics In the field of physics the Muslims made contributions in especially three domains. The first was the measurement of specific weights of objects and the study of the balance following upon the work of Archimedes. In this domain the writings of al-Biruni and al-Khazini stand out. Secondly they criticized the Aristotelian theory of projectile motion and tried to quantify this type of motion. The critique of Ibn Sina, Abu'l-Barakat al-Baghdadi, Ibn Bajjah and others led to the development of the idea of impetus and momentum and played an important role in the criticism of Aristotelian physics in the West up to the early writings of Galileo. Thirdly there is the field of optics in which the Islamic sciences produced in Ibn al-Haytham (the Latin Alhazen) who lived in the 11th century, the greatest student of optics between Ptolemy and Witelo. Ibn al-Haytham's main work on optics, the Kitah al-manazir, was also well known in the West as Thesaurus opticus. Ibn al-Haytham solved many optical problems, one of which is named after him, studied the property of lenses, discovered the camera obscura, explained correctly the process of vision, studied the structure of the eye, and explained for the first time why the sun and the moon appear larger on the horizon. His interest in optics was carried out two centuries later by Qutb al-Din al-Shirazi and Kamal al-Din al-Farisi. It was Qutb al-Din who gave the first correct explanation of the formation of the rainbow.

GeographyLikewise in geography, Muslims were able to extend their horizons far beyond the world of Ptolemy. As a result of travel over land and by sea and the facile exchange of ideas made possible by the unified structure of the Islamic world and the hajj which enables pilgrims from all over the Islamic world to gather and exchange ideas in addition to visiting the House of God, a vast amount of knowledge of areas from the Pacific to the Atlantic was assembled. The Muslim geographers starting with al-Khwarazmi, who laid the foundation of this science among Muslims in the 9th century, began to study the geography of practically the whole globe minus the Americas, dividing the earth into the traditional seven climes each of which they studied carefully from both a geographical and climactic point of view. They also began to draw maps some of which reveal with remarkable accuracy many features such as the origin of the Nile, not discovered in the West until much later. The foremost among Muslim geographers was Abu 'Abdallah al-Idrisi, who worked at the court of Roger II in Sicily and who dedicated his famous book, Kitab al-rujari (The Book of Roger) to him. His maps are among the great achievements of Islamic science. It was in fact with the help of Muslim geographers and navigators that Magellan crossed the Cape of Good Hope into the Indian Ocean. Even Columbus made use of their knowledge in his discovery of America.

Chemisstry The very name alchemy as well as its derivative chemistry come from the Arabic al-kimiya'. The Muslims mastered Alexandrian and even certain elements of Chinese alchemy and very early in their history, produced their greatest alchemist, Jabir ibn Hayyan (the Latin Geber) who lived in the 8th century. Putting the cosmological and symbolic aspects of alchemy aside, one can assert that this art led to much experimentation with various materials and in the hands of Muhammad ibn Zakariyya' al-Razi was converted into the science of chemistry. To this day certain chemical instruments such as the alembic (al-'anbiq) still bear their original Arabic names and the mercury-sulphur theory of Islamic alchemy remains as the foundation of the acid-base theory of chemistry. Al-Razi's division of materials into animal, vegetable and mineral is still prevalent and a vast body of knowledge of materials accumulated by Islamic alchemists and chemists has survived over the centuries in both East and West. For example the use of dyes in objects of Islamic art ranging from carpets to miniatures or the making of glass have much to do with this branch of learning which the West learned completely from Islamic sources since alchemy was not studied and practiced in the West before the translation of Arabic texts into Latin in the 11th century .

TechnologyIslam inherited the millenial experience in various forms of technology from the peoples who entered the fold of Islam and the nations which became part of Dar al-Islam. A wide range of technological knowledge, from the building of water wheels by the Romans to the underground water system by the Persians, became part and parcel of the technology of the newly founded order. Muslims also imported certain kinds of technology from the Far East such as paper which they brought from China and whose technology they later transmitted to the West. They also developed many forms of technology on the basis of earlier existing knowledge such as the metallurgical art of making the famous Damascene swords, an art which goes back to the making of steel several thousand years before on the Iranian plateau. Likewise Muslims developed new architectural techniques of vaulting, methods of ventilation, preparations of dyes, techniques of weaving, technologies related to irrigation and numerous other forms of technology, some of which survive to this day.

ArchitectureOne of the major achievements of Islamic civilization is architecture which combines technology Treatises on natural and art. The great masterpieces of Islamic architecture from the Cordoba Mosque and the Dome of the Rock in Jerusalem to the Taj Mahal in India, scientists were often display this perfect wedding between the artistic illustrated with detailed principles of Islam and remarkable technological know-how. Much of the outstanding medieval facilitate teaching of the architecture of the West is in fact indebted to the techniques of Islamic architecture. When one views the Notre Dame in Paris or some other Gothic cathedral, one is reminded of the building techniques which travelled from Muslim Cordoba northward. Gothic arches as well as interior courtyards of so many medieval and Renaissance European structures remind the viewer of the Islamic architectural examples from which they originally drew. In fact the great medieval European architectural tradition is one of the elements of Western civilization most directly linked with the Islamic world, while the presence of Islamic architecture can also be directly experienced in the Moorish style found not only in Spain and Latin America, but in the southwestern United States as well.

Natural hitory and Geography The vast expanse of the Islamic world enabled the Muslims to develop natural history based not only on the Mediterranean world, as was the case of the Greek natural historians, but also on most of the Eurasian and even African land masses. Knowledge of minerals, plants and animals was assembled from areas as far away as the Malay world and synthesized for the first time by Ibn Sina in his Kitab al-Shifa' (The Book of Healing). Such major natural historians as al-Mas'udi intertwined natural and human history. Al-Biruni likewise in his study of India turned to the natural history and even geology of the region, describing correctly the sedimentary nature of the Ganges basin. He also wrote the most outstanding Muslim work on mineralogy.

Botany Zoology As for botany, the most important treatises were composed in the 12th century in Spain with the appearance of the work of al-Ghafiqi. This is also the period when the best known Arabic work on agriculture, the Kitab al-falahah, was written. The Muslims also showed much interest in zoology especially in horses as witnessed by the classical text of al-Jawaliqi, and in falcons and other hunting birds. The works of al-Jahiz and al-Damiri are especially famous in the field of zoology and deal with the literary, moral and even theological dimensions of the study of animals as well as the purely zoological aspects of the subject. This is also true of a whole class of writings on the "wonders of creation" of which the book of Abu Yahya al-Qazwini, the 'Aja'ih al-makhluqat (The Wonders of Creation) is perhaps the most famous.