In Buddhism, the belief in six paths describes a karma-based life circulation involving six worlds. Some of them are so obvious on Earth, like Manushya and Asura, but where are the other worlds, especially Preta and Naraka, are they also on Earth? if a biological human being is super greedy, does he or she belong to Preta, or he or she still lives in Manushya but will be reborn as Preta next life