Monday, 7 September 2015

Contribution of India in Medicine ,Surgery, Civil Engineering and Shipping and Navigation


Medicine & Surgery


Ayurveda as a science of medicine owes its origins in ancient India. Ayurveda consists of two Sanskrit words - 'ayur' meaning age or life, and 'veda' which means knowledge. Thus, the literal meaning of Ayurveda is the science of life or longevity. Ayurveda constitutes ideas about ailments and diseases, their symptoms, diagnosis and cure, and relies heavily on herbal medicines, including extracts of several plants of medicinal values. This reliance on herbs differentiates Ayurveda from systems like Allopathy and Homeopathy. Ayurveda has also always disassociated itself with witch doctors and voodoo.
Ancient scholars of India like Atreya, and Agnivesa have dealt with principles of Ayurveda as long back as 800 BC. Their works and other developments were consolidated by Charaka who compiled a compendium of Ayurvedic principles and practices in his treatise Charaka-Samahita, which remained like a standard textbook almost for 2000 years and was translated into many languages, including Arabic and Latin. 'Charaka-Samahita' deals with a variety of matters covering physiology, etiology and embryology, concepts of digestion, metabolism, and immunity. Preliminary concepts of genetics also find a mention, for example, Charaka has theorized blindness from the birth is not due to any defect in the mother or the father, but owes its origin in the ovum and the sperm.
In ancient India, several advances were also made in the field of medical surgery. Specifically these advances icluded areas like plastic surgery, extraction of catracts, and even dental surgery. Roots to the ancient Indian surgery go back to at least circa 800 BC. Shushruta, a medical theoretician and practitioner, lived 2000 years bebore, in the ancient Indian city of Kasi, now called Varanasi. He wrote a medical compendium called 'Shushruta-Samahita. This ancient medical compendium describes at least seven branches of surgery: Excision, Scarification, Puncturing, Exploration, Extraction, Evacuation, and Suturing. The compendium also deals with matters like rhinoplasty (plastic surgery) and ophthalmology (ejection of cataracts). The compendium also focuses on the study the human anatomy by using a dead body.
In ancient India Medical Science supposedly made many advances. Specifically these advances were in the areas of plastic surgery, extraction of cataracts, and dental surgery. There is documentary evidence to prove the existence of these practices.

An artist's impression of an operation being performed in ancient India. In spite of the absence of anesthesia, complex operations were performed. The practice of surgery has been recorded in India around 800 B.C. This need not come as a surprise because surgery (Shastrakarma) is one ofthe eight branches of Ayurveda the ancient Indian system of medicine. The oldest treatise dealing with surgery is the Shushruta Samahita (Shushruta's compendium). Shusruta who lived in Kasi was one of themany Indian medical practitioners who included Atraya and Charaka. He was one of the first to study the human anatomy. In the Shusruta, Samahita he has described in detail the study of anatomy withthe aid of a dead body. Shusruta's forte was rhinoplasty (Plastic surgery)and ophthalmialogy (ejection of cataracts). Shushruta has described surgery under eight heads Chedya (excision), Lekhya (scarification),Vedhya (puncturing), Esya (exploration), Ahrya (extraction), Vsraya (evacuation) and Sivya (Suturing).
Yoga is a system of exercise for physical and mental nourishment. The origins of yoga are shrouded in antiquity and mystery. Since Vedic times, thousand of years before, the principles and practice of yoga have crystallized. But, it was only around 200 BC that all the fundamentals of yoga were collected by Patanjali in his treatise, named Yogasutra, that is, Yoga-Aphorisms.
In short, Patanjali surmised that through the practice of yoga, the energy latent within the human body may be made live and released, which has a salubrious affect on the body and the mind. Now, in modern times, clinical practices have established that several ailments, including hypertension, clinical depression, amnesia, acidity, can be controlled and managed by yogic practices. The application of yoga in physiotherapy is also gaining recognition.



Civil Engineering & Architecture


Gateway At Harappa: Indus Valley Civilization

India's urban civilization is traceable to Mohenjodaro and Harappa, now in Pakistan, where planned urban townships existed 5000 years before. From then onwards, the ancient Indian architecture and civil engineering continued to develop and grow. It found manifestation in construction of temples, palaces and forts across the Indian peninsula and the neighbouring regions. In ancient India, architecture and civil engineering was known as sthapatya-kala, literal translation of which means the art of constructing (something).
During the periods of Kushan Empire and Maurya empires, the Indian architecture and civil engineering reached to regions like Baluchistan and Afghanistan. Statues of Buddha were cut out, covering entire mountain faces and cliffs, like Buddhas of Bamiyan, Afghanistan. Over a period of time, ancient Indian art of construction blended with Greek styles and spread to Central Asia.
On the other side, Buddhism took Indian style of architecture and civil engineering to countries like Sri Lanka, Indonesia, Malaysia, Vietnam, Laos, Cambodia, Thailand, Burma, China, Korea and Japan. Angkor Wat is a living testimony to the contribution of Indian civil engineering and architecture to the Cambodian Khmer heritage in the field of architecture and civil engineering.
In mainland India of today, there are several marvels of ancient India's architectural heritage, including World heritage sites like Ajanta, Ellora, Khajuraho, Mahabodhi Temple, Sanchi, Brihadisvara Temple and Mahabalipuram.



Production Technology


Mechanical and production technology of ancient India ensured processing of natural produce and their conversion into merchandise of trade, commerce and export. A number of travelers and historians (including Megasthanes, Ptolemy, Faxian, Xuanzang, Marco Polo, Al Baruni and Ibn Batuta) have indicated a variety of items, which were produced, consumed and exported around that society's "known world" by the ancient Indians.



Shipbuilding & Navigation


A panel found in Mohenjodaro depicts a sailing craft, and thousands of years later Ajanta murals also depict a sea-faring ship. The science of shipbuilding and navigation was well known to ancient Indians. Sanskrit and Pali texts are replete with maritime references, and ancient Indians, particularly from the coastal regions, were having commercial relations with several countries of across the Bay of Bengal like Cambodia, Java, Sumatra, Borneo, and even up to China. Similar maritime and trade relations existed with countries across the Arabian Sea like Arabia, Egypt and Persia.
Even around circa 500 AD, sextants and mariner's compass were not unknown to ancient Indian shipbuilders and navigators. J.L. Reid, a member of the Institute of Naval Architects and Shipbuilders, England, at around the beginning of the 20th century has got published in the Bombay Gazetteer that "The early Hindu astrologers are said to have used the magnet, in fixing the North and East, in laying foundations, and other religious ceremonies. The Hindu compass was an iron fish that floated in a vessel of oil and pointed to the North. The fact of this older Hindu compass seems placed beyond doubt by the Sanskrit word 'Maccha-Yantra', or 'fish-machine', which Molesworth gives as a name for the mariner's compass".

Contribution of India in Astrology and Physics

Ancient India's contributions in the field of astronomy are well known and well documented. The earliest references to astronomy are found in the Rig Veda, which are dated 2000 BC. During next 2500 years, by 500 AD, ancient Indian astronomy has emerged as an important part of Indian studies and its affect is also seen in several treatises of that period. In some instances, astronomical principles were borrowed to explain matters, pertaining to astrology, like casting of a horoscope. Apart from this linkage of astronomy with astrology in ancient India, science of astronomy continued to develop independently, and culminated into original findings, like:

  • The calculation of occurrences of eclipses
  • Determination of Earth's circumference
  • Theorizing about the theory of gravitation
  • Determining that sun was a star and determination of number of planets under our solar system
The Pleiades hold a prominent place as the mothers or wet nurses of the newborn infant in one of the most ancient and central Hindu myths, that of the birth of the war-god Rudra/Skanda, who evidently represents, among other things, the victorious rising sun (and as vernal sun the new year). The Pleiades are said to have been the wives of the seven sages, who are identified with the seven stars of the Great Bear.
The Great Bear's Old Tamil name elu-meen 'seven-star' corresponds to the combination of the pictograms '7' + 'fish', which alone constitutes the entire text of one finely carved Indus seal. The Satapatha-Brahmana states that the six Pleiades were separated from their husbands on account of their infidelity; other texts specify that only one of the seven wives, Arundhati, remained faithful and was allowed to stay with her husband: she is the small star Alcor in the Great Bear, pointed out as a paradigm of marital virtue to the bride in the Vedic marriage ceremonies.
Evidence for the Harappan origin of this myth is provided, among other things, by Indus seals which show a row of six or seven human figures; their female character is suggested by the one long plait of hair, which to the present day has remained characteristic of the Indian ladies.

Physics


The root to the concept of atom in ancient India is derived from the classification of material world in five basic elements by ancient Indian philosophers. These five 'elements' and such a classification existed since the Vedic times, around 3000 BC before. These five elements were the earth (prithvi), fire (agni), air (vayu), water (jaal) and ether or space (aksha). These elements were also associated with human sensory perceptions: earth with smell, air with feeling, fire with vision, water with taste and ether/space with sound. Later on, Buddhist philosophers replaced ether/space with life, joy and sorrow.
From ancient times, Indian philosophers believed that except ether or space, all other elements were physically palpable and hence comprised of small and minuscule particles of matter. They believed that the smallest particle which could not be subdivided further was paramanu (can be shortened to parmanu), a Sanskrit word. Paramanu is made of two Sanskrit words, param meaning ultimate or beyond and anu meaning atom. Thus, the term "paramanu" literally means 'beyond atom' and this was a concept at an abstract level which indicated the possibility of splitting atom, which is now the source of atomic energy. The term "atom" however should not be conflated with the concept of atom as it is understood today.
Kanada, a 6th century, Indian philosopher was the first person who went deep systematically in such theorization. Another Indian, philosopher Pakudha Katyayana, who was a contemporary of Buddha, also propounded the ideas about the atomic constitution of the material world. All these were based on logic and philosophy and lacked any empirical basis for want of commensurate technology. Similarly, the principle of relativity (not to be confused with Einstein's theory of relativity) was available in an embryonic form in the Indian philosophical concept of 'sapekshavad', the literal translation of this Sanskrit word is theory of relativity.
These theories have attracted attention of the Indologists, and veteran Australian Indologist A. L. Basham has concluded that they were brilliant imaginative explanations of the physical structure of the world, and in a large measure, agreed with the discoveries of modern physics.

Contribution of India in Mathematics

Mathematics represents a very high level of abstraction attained by human brain. In ancient India, roots to mathematics can be traced to Vedic literature, which are around 4000 years old. Between 1000 BC and 1000 AD, a number of mathematical treatises were authored in India.
Will Durant, American historian (1885-1981) said that India was the mother of our philosophy of much of our mathematics.
It is now generally accepted that India is the birth place of several mathematical concepts, including zero, the decimal system, algebra and algorithm, square root and cube root. Zero is a numeral as well as a concept. It owes its origin to the Indian philosophy which had a concept of 'sunya', literal translation of which is 'void' and zero emerged as a derivative symbol to represent this philosophical concept.
Geometrical theories were known to ancient Indians and find display in motifs on temple walls, which are in many cases replete with mix of floral and geometric patterns. The method of graduated calculation was documented in a book named "Five Principles" (Panch-Siddhantika) which dates to 5th Century AD.A. L. Basham, an Australian Indologist, writes in his book, The Wonder That was India that "... the world owes most to India in the realm of mathematics, which was developed in the Gupta period to a stage more advanced than that reached by any other nation of antiquity.
The success of Indian mathematics was mainly due to the fact that Indians had a clear conception of the abstract number as distinct from the numerical quantity of objects or spatial extension.
Algebraic theories, as also other mathematical concepts, which were in circulation in ancient India, were collected and further developed by Aryabhatta, an Indian mathematician, who lived in the 5th century, in the city of Patna, then called Pataliputra. He has referred to Algebra (as Bijaganitam) in his treatise on mathematics named Aryabhattiya.
Another mathematician of the 12th century, Bhaskaracharya also authored several treatises on the subject - one of them, named Siddantha Shiromani has a chapter on algebra. He is known to have given a basic idea of the Rolle's theorum and was the first to conceive of differential calculus.
In 1816, James Taylor translated Bhaskaracharya's Leelavati into English. Another translation of the same work by English astronomer Henry Thomas Colebruke appeared next year in 1817.
The credit for fine-tuning and internationalizing these mathematical concepts - which had originated in India - goes to the Arabs and Persians. Al-Khawarizmi, a Persian mathematician, developed a technique of calculation that became known as "algorism." This was the seed from which modern arithmetic algorithms have developed. Al-Khwarizmi's work was translated into Latin under the title Algoritmi de numero Indorum, meaning The System of Indian Numerals. A mathematician in Arabic is called Hindsa which means from India.
The 14th century Indian mathematician Madhava of Sangamagrama, along with other mathematicians of the Kerala school, studied infinite series, convergence, differentiation, and iterative methods for solution of non-linear equations.
Jyestadeva of the Kerala school wrote the first calculus text, the Yuktibhasa, which explores methods and ideas of calculus repeated only in seventeenth century Europe.

Ancient Indian Civilization,Culture and Science

The Term ‘India‘ was taken up from River Indus where the first settlers established their residence. The river was worshipped by Aryans as Sindhu.
The Number System was first invented in ancient India. Zero was first used byAryabhatta.
The Decimal System and Place Value System were developed in India in 100 B.C.
Takshila holds distinction of being World’s First University. It was established in 700 BC. More than 10,000 students some of them from far-off countries like China and Japan enrolled in about 60 subjects. It was one of the greatest achievements of Ancient India.
The Earliest School of Medicine Ayurveda was known to mankind. It was consolidated by Charaka some 2500 years ago. Over 2600 years ago Sushruta thefather of Surgery conducted Surgeries like Cataract, Fractures, and Rhinoplasty and Brain Surgeries without the use of Anesthesia.
Navigation started in the River Sindu 6000 years ago. Derived from the Sanskrit wordNavgatih Ancient Indians excelled in this art. ‘Navy’ word is also derived from Sanskrit word ‘nou’.
Bhaskaracharya calculated the Time Taken by the Earth to Orbit the Sun hundreds of years ago. Guess his calculation done in 5th century- 365.258756484 days.
Budhayana was the First Indian Mathematician (6th century) to calculate the value of ‘pi’ and explained the concept of Pythagorean Theorem. Ancient India is the home ofAlgebra, Trigonometry and Calculus. Greeks and Romans used the numbers as big as 106 whereas ancient Indians used numbers as big as 10*53 (10 to the power of 53).
Saurashtra is the home of Earliest Reservoir and Dam built for Irrigation. The records of King Rudradaman I of 150 BC show that a beautiful lake called Sudarshana was constructed on the hills of Raivataka during Chandragupta Maurya’s time.
Shataranja or Ashtapada or common Chess Was Invented in India
Pre-History – 2000 BC
Indian History is as old as the History of Mankind. Artifacts dating back to as much as 500,000 years have been found. Rock Paintings; Cave Life & Cave Art.
2000 BC-1000 BC
Harappa and Mohenjodaro Communities (2500 – 1550 B.C)
Dravidian traditions are established in south
1000 BC – 600 BC
Aryan Migration to India
Vedas are composed
Mahabharat is composed
Hinduism takes deep roots
Caste System is established
600 BC – 400 BC
Gautama Buddha (563 -483 B.C.)
Mahaveera (599 B.C.)
Bimbisara of Magadha (542-490 B.C.)
Jainism
400 BC – 0 BC
The Great Alexander invades India (326 B.C.)
Chandra Gupta Maurya (300 B.C.) and establishment of the Indian Empire
Emperor Ashoka (272 B.C) and spread of Buddhism
Mauryan Empire
Ancient India, the land of mystery

0 BC – 1200 A.D
Khajuraho Temples are built.
The Hoysala Dynasty
The temples of Belur, Halebid are built.
Guptas (320-647)
Pallavas of Kanchi (300-888)
Fa-Hien (400) & Hiuen-Tsiang (630) in India
Alberuni in India (1020)
Mahmud Ghazni invades Somnath Temple (1026)

THE ANCIENT INDIAN CIVILIZATION, CULTURE, SCIENCE & TECHNOLOGY AND MANAGEMENT is one of the oldest (almost pioneering system) and begins with prehistoric human activity at Mehrgarh, in present-day Pakistan, and continues through the Indus Valley Civilization to early states and empires. If we can, keenly observe our Science and Technology from our Epics, we can understand, how advanced our systems are in arena of Space, Polar, Nuclear Sciences, Automobile Engineering, Information Technology, Communications.
Though the British colonial rule introduced western education in India and in the same we are learning today’s ongoing advancements and the achievement and presuming our in capabilities to attain them. But, the fact is the advancements are much farther to understand that has been explained in our ancient Vedas and epics.
Basically, Indians are basically Philosophical People who believes in Deeds and Acts and determines that the Karma is the resultants of life. And INDIA also is known asKarma Bhoomi and Karma” literally means “Deed” or “Act”, and more broadly names the Universal Principle of Cause And Effect, Action And Reaction, which Hindus believe governs all consciousness. Karma is not Fate, for man acts with free will creating his own destiny. According to the Vedas, if we sow goodness, we willreap goodness; if we sow evil, we will reap evil. Karma refers to the totality of our actions and their concomitant reactions in this and previous lives, all of which determine our future. The conquest of karma lies in intelligent action and dispassionate reaction. Not all karmas rebound immediately. Some accumulate and return unexpectedly in this or other births. We produce Karma in four ways:
Through Thoughts
 Through Words
 Through Actions That We Perform Ourselves
 Through Actions Others Do Under Our Instructions
Everything that we have ever thought, spoken, done or caused is Karma; as is also that which we think, speak or do this very moment. Hindu scriptures divide karma into Three kinds:
Sanchita is the accumulated Karma. It would be impossible to experience and endure all Karmas in one life. From this stock of Sanchita Karma, a handful is taken out to serve one lifetime and this handful of actions, which has begun to bear fruit and which will be exhausted only on their fruit being enjoyed and not otherwise, is known as Prarabdha Karma.
Prarabdha Fruit-bearing Karma is the portion of accumulated Karma that has “Ripened” and appears as a particular problem in the present life.
Kriyamana is everything that we produce in current life. All Kriyamana Karmas flow in to Sanchita Karma and consequently shape our future. Only in human life we can change our future destiny. After death we loose Kriya Shakti (Ability To Act) and Do (Kriyamana) Karma until we are born again in Human Body.
Actions performed consciously are weighted more heavily than those done unconsciously. But just as poison affects us if taken unknowingly, suffering caused unintentionally will also give appropriate karmic effect. Only human beings that can distinguish right from wrong can do (Kriyamana) Karma. Animals and young Children are not creating New Karma (and thus can not affect their future destiny) as they are incapable of discriminating between right and wrong. However, all sentient beings can feel the effects of Karma, which are experienced as pleasure and pain.
Tulsidas, a Hindu saint, said: “Our destiny was shaped long before the body came into being.” As long as the stock of Sanchita Karma lasts, a part of it continues to be taken out as Prarabdha Karma for being enjoyed in one lifetime, leading to the cycle of Birth and Death. A Jiva cannot attain Moksha (Liberation) from the cycle of Birth and Death, until the accumulated Sanchita Karmas are completely exhausted.
The Cycle of Birth and Death on Earth is formed from 8.4 millions forms of life and only one of them is Human. Only as humans, are we in position to do something about our destiny by doing the right thing at the right time. Through Positive Actions, Pure Thoughts, Prayer, Mantra and Meditation, we can resolve the influence of the Karma in present life and turn the destiny for the better. A Spiritual Master knowing the sequence in which our Karma will bear fruit, can help us. As humans we have the opportunity to speed up our spiritual progress with practice of good Karma. We produce Negative Karma because we lack knowledge and clarity.
Unkindness yields spoiled fruits, called PAAP, and good deeds bring forth sweet fruits, called PUNYA. As one acts, so does he become: one becomes virtuous by virtuous action, and evil by evil action.
Though, Indians are philosophical people, our Ancient Indians has made enormous advancements which are far away to understand.
Ancient Indians has determined the relationship between Knowledge of Science and Technology, with Religion and Social Relations. The Archaeological remains of the Indus Valley reveal Knowledge of Applied Sciences. Scientific Techniques were adopted in Irrigation, Metallurgy, Making of Fired Bricks and Pottery, and Simple Reckoning and Measurement of Areas and Volumes. Aryan Achievements in the field of Astronomy, Mathematics and Medicine are well known. Chinese records indicate knowledge of a dozen books of Indian origin. Brahmagupta’s Sidhanta as well as Charaka’s and Susrata’s Samhitas were translated into Arabic in the 9th or 10th centuries A.D. In Ancient Indian Mathematics was known by the general name ofGanita, which included Arithmetic, Geometry, Algebra, Astronomy and Astrology.
It was Aryabhatta, who gave a new direction to Trigonometry. The Decimal System too was an innovation of India. By the Third Century B.C. Mathematics, Astronomy and Medicine began to develop separately. In the field of Mathematics Ancient Indiansmade Three Distinct Contributions, The Notation System, The Decimal System and the Use of Zero. The earliest epigraphic evidence of the use of Decimal System belongs to the Fifth Century A.D. Before these Numerals appeared in the West they had been used in India for Centuries. They are found in the inscriptions of Ashoka in the Third Century B.C. Indians were the first to use the Decimal System. The famousMathematician Aryabhata (A.D. 476-500) was acquainted with it. The Chinese learnt this System from the Buddhist Missionaries, and the western world borrowed it from the Arab as when they came in contact with India. Zero was discovered by Indians in about the second century B.C. From the very beginning Indian Mathematicians considered Zero as a separate Numeral, and it was used in this sense in Arithmetic. In Arabia the earliest use of Zero appears in A.D. 873. The Arabs learnt and adopted it from India and spread it in Europe. So far as Algebra is concerned both Indians and Greeks contributed to it, but in Western Europe its knowledge was borrowed not from Greece but from the Arabs who had acquired it from India. In the second century B.C. Apastemba contributed to practical geometry for the construction of altars on which the kings could offer sacrifices. It describes acute angle, obtuse angle, right angle etc.Aryabhata formulated the rule for finding the Area of a Triangle, which led to the Origin of Trigonometry. The most famous work of his Time is the Suryasiddanta the like of which was not found in Contemporary ancient east.
During the Gupta period Mathematics was developed to such an extent and more Advanced than any other nation of Antiquity. Quite early India devised a Rudimentary Algebra which led to more Calculations than were possible for the Greeks and led to the Study of Number for its own sake. The earliest inscription regarding the Data by a System of Nine Digits and a Zero is dated as 595 A.D. evidently the system was known to Mathematicians some Centuries before it was employed in inscriptions. Indian Mathematicians such as Brahmagupta (7th century), Mahavira (9th century) and Bhaskara (12th century) made several discoveries which were known to Europe only after Renaissance. The understood the Importance of Positive and Negative Quantities, evolved sound System of extracting Squares and Cube Roots and could solve quadratic and certain types of Indeterminate Equations. Aryabhata gave approximate value of Pie. It was more accurate than that of the Greeks. Also some strides were made in Trigonometry, Empirical Geometry and Calculus. Chiefly inAstronomy the Mathematical implications of Zero and Infinity were fully realized unlike anywhere in the world. Among the various Branches of Mathematics, Hindus gave Astronomy the Highest Place of Honour. Suryasidhanta is the best know book on Hindu Astronomy. The text was later modified Two or Three Times between 500 A.D. and 1500 A.D. The System laid down in the book can even now be used to predict Eclipse within an error of two or three hours. The most renowned Scholars of Astronomy were Aryabhata and Varhamihira. Aryabhata belonged to the Fifth Century and Varahamihira to the Sixth. Aryabhata calculated the position of the planets according to the Babylonian method. He discovered the cause of Lunar and Solar Eclipses. The circumference of the earth which he measured on the basis of the speculation is considered to be correct even now. He pointed out that the sun is stationary and the earth rotates around it. The book of Aryabhata is the Aryabhatiya.Varhimihira’s well-known work is called Brihat Samhita which belongs to the Sixth Century A.D. Varhaihira stated that the Moon rotates around the Earth and the Earth Rotates around the Earth Rotates around the Sun. He utilized several Greek works to explain the Movement of the Planets and some other Astronomical Problems. Although Greek knowledge influenced Indian Astronomy, there is no doubt that Indian pursued the subject further and made use of it in their observations of the planets.Aryabhata wrote a book when he was barely 23 years. Varhmihira of the Sixth Century wrote a summary of Five Astronomical Books current wrote a summary of Five Astronomical Books current in his time. Brahamagupta of the seventh century A.D. appreciated the value of observation and astronomy and his book was translated into Arabic. One last great scientist was Bhaskara II. One of the chapters in the bookSidhanta Shiromani, dealing with mathematics, is the well-known work of Lilavait.Nevertheless, Indian views on the origin and evolution of the universe was matter of religion rather than of science. The Cosmic Schemes of Hindus and Jains in Fundamentals were the same. All postulated a flat earth although Indian Astronomers came to know that this was incorrect early in the Christian Era. The idea of flat such remained for religious purposes.
Regarding Astronomy proper it was studied as a Vedanta. Its name was Jyotisa. A primitive kind of Astronomy was developed mainly for the purpose of settling the Dates and Times at which Periodical sacrifices were to be performed. Several Greek words gained momentum in Sanskrit through knowledge of Greek Astronomy. The Sixth Century Astronomer Varahamihira called one of his Five Astronomical Systems as Romaka Sidhanta. It is only Western Astronomy that introduced in Indian the Sign of the Zodaic. The Seven-Day Week, the Hour, and several other ideas. Later, Indian Astronomers made some Advances on the knowledge of the Greeks and passed on their knowledge with that of Mathematics via the Arabs to Europe. As early as Seventh Century, a Syrian Astronomer knew of the Greatness of Indian Astronomy and Mathematics. In the field of Medicine, Aurveda was the contribution of India. Seven Hundred Hymns in the Vedas, particularly Atharva Veda, refer to topics of Ayurveda. Indeed, the whole approach was not scientific. The earliest mention of Medicines is in the Atharva Veda. As in order Ancient Societies, the remedies recommended in it are replete with magical charms and spells. Medicine could not develop along scientific lines.
In Post-MauryaTtime India witnessed Two famous Scholars of the Aurveda, Susrtua and Charaka. In the Susrutasmhita Susruta describes Methods of Operating Cataract, Stone Disease and several other Ailments. He mentions as many as 121 implements to be used for operations. For the treatment of disease he lays special emphasis on diet. And cleanliness for Charaka wrote the Charakasamhita in the second century A.D. It is like Encyclopedia of Indian Medicines. It describes various types of Fever, Leprosy, Hysteria and Tuberculosis. Possibly Charaka did not know that some of these are infections. His book contains the names of a large number of plants and herbs which were to be used as medicine. The book is thus useful not only for study of ancient Indian medicine but also for ancient Indian flora and chemistry. In subsequent centuries Indian medicines developed on the lines laid down by Charaka. The Vedic hymns attribute various diseases to demons and spirits and the remedies for hymns prescribing correctly the symptoms of pulmonary tuberculosis, and connecting dropsy with heart diseases. However, National Medicine began to 800 B.C. Medicine became a regular subject of study at centers like Taxila and Varanasi. The latter specialized in surgery. Susrutasmhita was compiled in the fourth century A.D. Charaka compiled the teachings of two of his predecessors who served at Taxila. Charaka and Susruta’s Samhits reached as far as Manchuria through translations in Tibetan and other Asian languages. In the eighth century A.D. these books influenced European medicine as carried over by two Arabs. Charaka Samhita was published as late as 1550 in Arabic.
Despite these achievements, medicine did not make any remarkable strides, for absence of dissection led to ignorance of anatomy and physiology. Indians were equally aware of the functions of internal organs such as lungs and brain. Surgery of some kind was even during the Vedic period. It was only from the time of Susruta that surgery came to occupy an important place in medicine. Surgical operations were performed like taking the fetus out of the womb, including caesarian, section, treatment of fistula, removal of stone from bladder and plastic surgery for the nose. Despite the developments as the above in medicine, ancient Indian doctors, in general had no knowledge of the functions of brain, although they knew the importance of the spinal cord and the existence of nervous system. Once again social taboos stood in the way of the growth of medical knowledge. It was a taboo to touch dead bodies. Despite the fact that the physiological knowledge of ancient Indians was very poor, Indians evolved empirical surgery. They knew bone-setting, plastic surgery and surgeons in ancient India were experts is repairing noses, ears and lips lost, or injured by mutilation. The physician was a respectable member of society as the Vaidyas were ranked higher in the hierarchy. Even to this day the rules of professional behaviour laid down in medical tests are almost the same as those of Hippocrates. Of course, some statements at one place state that the Physicians should not betray the patients and should be always of pleasant speech. In this context, he pleads that every day they must pray on rising and going to bed, since the work of the welfare of the all beings specially cows.
Regarding physics, it was closely linked with religion and theology and it even differed from sect to sect. Almost all religions believed that the universe consisted of elements like earth, air, water, and akasa (ether)Most schools maintained that there were as many types of atoms as there were elements. Some Buddhists conceived atom as the minutes object capable of occupying space but also as occupying the minutest possible duration of time coming into being and vanishing almost in an instant only to be succeeded by another atom caused by the first. This somewhat resembles the quantum theory of Planck. The Vaisesika School believed a single atom to be a point in space completely without magnitude. Further, most of the schools believed that atoms constitute molecules. However, the Indian atomic theories were not based on experiment but intuitive logic. The great theologian Sankara strongly argued against their existence. Beyond this knowledge of atoms, physics in India did not develop much. However, in the science of acoustics, India made real discovers. Based on experience for this correct recitation on Vedas, the human era was highly trained for the phonetic study – distinguished musical tones far closer than those of other ancient musical systems much earlier than other civilization.

Regarding chemistry and metallurgy too, some progress was made in ancient times. The Harappans developed metallurgy of copper and bronze about 2500 B.C. The Vedic Aryans tanned leather, fermented grains and fruits, and dyed scale production of copper, iron and steel, brass, silver and gold and their alloys. Indian steel was highly esteemed in the ancient world and it was exported in large quantities. Tin and mercury were imported and worked. And from the seventh century, alchemy was referred to in literature. The medical chemistry of ancient India did succeed in producing many important alkalis, acids and metallic salts. It is claimed by Bashama that ancient Indians ever discovered a form of gun powder. The coming of middle ages, Indian chemists, like their counterparts in the rest of the world, became increasingly interested in a specific remedy for all diseases, the source of perpetual youth, and even the surest means to salvation. Although they could not make precious metals, they could understand the chemistry of metallic salts. The heights attained by Indians in metallurgy and engineering are borne out by the almost pure copper stature of Buddha found at Sultanganj and the famous iron Pillar at Mehrauli (Delhi which has been able to withstand rain and weather for centuries without rusting).