The first settlers on Easter Island didn't arrive until 1200 AD, up to 800 years later than previously thought, a new study suggests. The revised estimate is based on new radiocarbon dating of soil samples collected from one of oldest known sites on the island, which is in the South Pacific west of Chile.The finding challenges the widely held notion that Easter Island's civilization experienced a sudden collapse after centuries of slow growth. If correct, the finding would mean that the island's irreversible deforestation and construction of its famous Moai statues began almost immediately after Polynesian settlers first set foot on the island.The study, conducted by Terry Hunt of the University of Hawaii, Manoa and Carl Lipo of California State University, Long Beach, is detailed today in the online version of the journal Science.According to one widely held view, a small band of Polynesian settlers, perhaps no more than a few dozen people, arrived on the Easter Island sometime between 400 and 1000 AD.The settlers lived in harmony with the environment for hundreds of years and the population slowly grew. Some scientists estimate that at its height, Easter Island's population may have been as much as 20,000 people. Around 1200 AD, the story goes, the inhabitants began cutting down the island's subtropical trees and giant palms in large numbers to build canoes and to transport the giant stone statues, which started going up around this time.The large-scale deforestation led to soil erosion and over a span of several centuries, the island's ability to support wildlife and farming was compromised. People began to starve. In a last ditch effort at survival, they became cannibals.The collapse of both the island's ecology and civilization was so complete that by the time the Dutch arrived in the 1700s, Easter Island was a sandy grassland void of nearly all its native wildlife; its human inhabitants were reduced to a starving population of 3,000 or less.This is the story pieced together by researchers over the past several decades, but Hunt and Lipo think it is wrong.