Study Guide · Chapter 21
Ancient Indian Science, Mathematics, and Medicine — Expanded
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- Mathematics: The Indian numeral system (including the crucial concept of zero as a placeholder and as a number in its own right) was transmitted via the Arab world to Europe, ultimately becoming the basis of the modern "Arabic numerals" actually of Indian origin. Aryabhata (b. 476 CE) calculated the value of pi to four decimal places, gave methods for solving indeterminate equations, and correctly explained eclipses as shadow phenomena rather than the mythological Rahu-Ketu swallowing the sun/moon (a view he held even as it remained popular in folk belief). Brahmagupta (b. 598 CE) systematised rules for arithmetic operations involving zero and negative numbers in his Brahmasphutasiddhanta.
- Astronomy: Varahamihira's Panchasiddhantika summarised five earlier astronomical schools/treatises, including Greek (Romaka and Paulisha Siddhantas), showing cross-cultural scientific exchange.
- Medicine (Ayurveda): The Charaka Samhita (internal medicine, physiology, diagnosis) and Sushruta Samhita (surgery — describing over 120 surgical instruments and more than 300 surgical procedures, including early plastic surgery techniques such as rhinoplasty) are foundational Ayurvedic texts, compiled/redacted over several centuries but reaching their classical form by the Gupta era.
- Metallurgy: Beyond the famed Iron Pillar of Delhi, ancient India was renowned for high-quality "Wootz steel," produced in South India and exported widely — this steel was later prized in the Middle East as the raw material for the legendary "Damascus steel" blades.
- Chemistry: Ancient Indian texts show developed knowledge of distillation, calcination, and the preparation of alkalis and acids, particularly in alchemical (rasashastra) traditions that developed further in the medieval period.
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