The origins of Indic civilization are shrouded in the mists of very ancient history. Some archeological finds suggest that it dates back to 7000 BCE. In India too, as with all ancient science, speculations sometimes took precedence over observation, and qualitative descriptions over quantitative measurements. Yet there is much of relevance and interest in the scientific investigations and reflections of ancient Indic thinkers. In many fields of sustained research, such as mathematics, physics, astronomy, chemistry, and medicine, Hindu investigators observed and speculated insightfully.