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because in that time many things were build in which some are till in use and some are not but the things is same that if our ancestor did not take such type some things than in our time which is now will not be here. I think we will be still back and use different things made up of stone which was used by our ancestor. The technology used in the past where unique then that of now our ancestors used do work with stone whereas now scientist used to do with different machine. In ancient time many people from different place used to make different types of things like now which we do and in coming year there will be more often. In that time there were some civilizations like Egyptians, Indian, Chinese, Greek and so on. So in that time many people used to technological things which used to help us as well as other.
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