Atua: Sacred Gods from Polynesia

Ancient Polynesia remains one of the great mysteries of human migration. Groups of people sailing on double-hulled canoes eventually made their way out from the edges of the Western Pacific and found islands in the middle of the ocean, thousands of kilometres away. How did they do it? Were these feats of navigation and survival pure chance, when few of the intrepid voyagers reached an island and unknown numbers died in the attempt? Or was there something more?