Book Reviewed: Ancient Hindu Science by Alok Kumar

Science, medicine, and astronomy in ancient Hindu India This book provides a brief sketch of the scientific contributions of Hindus and reminds us of the mathematical tools perfected for astronomical and physical calculations. The author articulates the essence of Hindu science that includes mathematics, science, and medicine. He gives equal allocation of time and space for these subjects to highlight the dominance of ancient Indian Hindu science and mathematics. Often, the author uses the quotes of European authors like Florian Cajori (1859–1930), a Swiss American historian who did not specialize in the history of Indian science. The author could have considered the Indian discoveries and inventions on its merit than start off with a European view. Most Western historians of 19th and 20th centuries were Eurocentric, and Cajori’s focus was Greek and European mathematics, and often underestimated Indian contributions. However, the proudest moments for Hindu science were when Indian mathematicians like Aryabhata (fifth century CE) and Brahmagupta developed the concept of zero as a number and created the decimal system. Early Hindu scholars wrote about algebra (called Bijaganita) and trigonometric functions like sine (jya) and cosine. Aryabhata proposed that the Earth rotates on its axis and planets move in elliptical orbits long before it was “discovered” in Europe. Indian astronomers calculated the length of the solar year very precisely and developed methods to predict eclipses. In short, ancient India was a scientific powerhouse making discoveries not only in mathematics and astronomy, but also in health, medicine, surgery, chemistry, and agriculture that founded modern science. The wisdom of Hindus may be found in the earliest Hindu scriptures: "Let noble thoughts come to us from every side." Rigveda 1.89.1, a call for open-mindedness and wisdom from all directions. "Truth alone triumphs, not falsehood." Mundaka Upanishad 3.1.6a. And "You have the right to perform your duties, but not to the fruits of your actions." Bhagavad Gita 2.47. The author could have expanded on the chapters that focus on mathematics, and astronomy. But for in-depth studies, I recommend: “The History of Ancient Indian Mathematics" by C.N. Srinivas Iyengar; Works by D.D. Kosambi; and “The Crest of the Peacock" by George Verghese Joseph.