The tigris expedition (Libro en inglés)

“What could the first Sumerians have told us, if they returned to life? At least their tablets record how they came and from where. They came by ship. They came sailing in through the gulf, and their earliest works of art illustrated the kind of watercraft that brought them… “The Tigris Expedition was such a voyage… a voyage into the past. On a small raft-ship of tender reeds and rope we sailed a distance of over six thousand kilometers… This journeying showed that the ancient people of Mesopotamia, the Indus Valley. and egypt could have built man’s earliest civilizations… via primitive vessels at their disposal five thousand years ago. “Thusly, we journeyed back to man’s beginnings.” Thor Heyerdahl