Certain things or events, happens, that gets ingrained in the memory of not one person but of the whole race or population and then that information is passed on from one generation to the other thus becoming a legend. One such event was the great flood which got ingrained in the memory of humanity in a large scale as is evident from various legends not only from India but also from different parts of the world. The legend of the flood is one such memory of the humanity that is there in the legends of many tribes and civilizations, present and past, from Celtic in the north to India and also mentioned in the old testament. The mention of the great flood in also there in the Vedas