- The development of the decimal system and zero.
- The invention of the game of chess.
- The development of surgery and medicine.
- The production of some of the world's most beautiful and iconic art and architecture, such as the Taj Mahal and the temples of Khajuraho.
- The development of important religious traditions, such as Hinduism, Buddhism, and Sikhism.
- The development of important philosophical and scientific ideas, such as the idea of karma and rebirth and the theory of relativity.
- The development of important literary works, such as the Vedas and the Ramayana.
- The development of important mathematical, astronomical and astrological knowledge.
These are just a few of the many significant achievements of the ancient Indians. They were a highly advanced and sophisticated civilization that made many important contributions to the world.