Ocean waves, particularly long-period swells, lose very little energy as they travel. And unless they collide with an island and break, they are capable of traveling great distances. By comparison ...

But very large storms with high, sustained winds can generate waves with periods of more than 20 seconds. These waves travel ...

By 1500 B.C., these voyagers began moving east beyond New Guinea, first along the Solomon Island chain ... on observations of the stars, the ocean swells, the flight patterns of birds and other ...