Where did the Easter Island heads come from and what are they all about?

Easter Island Heads have been examined for decades and yet no answer can be given to the mystery as to why they were made. Thor Heyerdahl spent several months there and wrote of his experiences in Aku-Aku. The statues were made on the island and partially complete ones can be found in a quarry. The natives also demonstrated a method that could be used to move them and set them into place.

I think a long time ago, the people of Aku-Aku built the statues to scare away some of the other countries.

Or, they could have some religious significance.