Modern genetic evidence suggests that statue builders on islands such as Rapa Nui, also known as Easter Island, had a shared ancestry.
Polynesian voyagers settled islands across a vast expanse of the Pacific Ocean within about 500 years, leaving a genetic trail of the routes that the travelers took, scientists say.in western Polynesia headed south and then east, reaching Rarotonga in the Cook Islands by around the year 830.
“The colonization of eastern Polynesia was a remarkable event in which a vast area, some one-third of the planet, became inhabited by humans in … a relatively short period of time,” says archaeologist Carl Lipo of Binghamton University in New York, who wasn’t involved in the new research. In the new investigation, researchers identified DNA segments of exclusively Polynesian origin in 430 present-day individuals from 21 Pacific island populations. Island-specific genetic fingerprints enabled the scientists to reconstruct settlement paths, based on increases in rare gene variants that must have resulted from a small group moving from one island to another and giving rise to a new, larger population with novel DNA twists.
The Tuamotus include nearly 80 islands situated between Tahiti to the west and other islands to the north and east where settlers carved statues. The latter outposts consist of the Marquesas Islands, Mangareva and Rapa Nui. Another late-settled island where inhabitants carved statues, Raivavae, lies southwest of the Tuamotus.
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