In ancient authors such as Beroso , Alessandro Plistore , Apollodorus and Adideno in their writings affirmed the existence of Apkallu . This is legendary beings who are living in IV millennium BC with populations Sumerian and Babylonians . The descriptions that you have followed the model of Oannes , Or (according to the description of Alexander Polistore in a summons Beroso) a sort of fish But that hid human form They were Amphibians and under the tail of the fish hid feet , Their appearance reminiscent of a man wrapped in a modern diving suit . It is said that they leave during the day from the Persian Gulf to entertain men, teaching them Letters The Science and Arts . The Apkallu taught well to the inhabitants of Mesopotamia as build houses and temples, to compile laws To use the geometry To distinguish the seeds of the earth and reap the benefits. If this hypothesis proves reliable then origins of human knowledge should be sought in Apkallu own. The figure of Oannes assumed various names over time and forms Euedocus, Eneugamus, Eneuboulos, Anementus, Annedotus, Odacon and other names yet.
Astronomers Carl Sagan (U.S.) and Iosif Shklovsky (Russian) believe that in antiquity there have been contacts between humans and a form of extra-terrestrial life from the immense powers, arrived in Persian Gulf from space.