Is a really cool place. Apparently it has no trees because the natives cut them all down. After they cut down the last trees, war broke out, they turned to cannibalism and then vanished. Nobody knows how they moved the 10 ton stone moui's into place, nobody knows where they vanished to. NPR was doing a story on them today on the radio. They talked about at some point, some dude was asked to cut down the last tree on the island. And that action sparked the downfall. PBS is doing a special on it, sounds interesting.
*sure, people have theories