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Ancient Indians were the achievers of many things that we still use today.
- metallurgy: the science of working with metals
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They created the numbers we use today which are actually called Hindu-Arabic numerals. They even created the zero.
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Inoculation was invented by the Ancient Indians which is the process of injecting a small dose of a virus to help him or her build up defenses to a disease.
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The Ancient Indians also created Astronomy which is the study of stars and planets. The Indians knew about seven of the planets and that the sun was a star and that the planets revolved around it.