It's about an excavated Easter Island statue: "The excavation team also found about 800 grams of natural red pigment — nearly two pounds — in the burial hole, along with a human burial." This is from a current UCLA project to excavate a couple of the "heads."
(click image to go to article)
Thor Heyderdahl had already excavated one in the 1950's. This image also came from the article above.
