The reason people think they are [only] heads is there are about 150 statues buried up to the shoulders on the slope of a volcano, and these are the most famous, most beautiful and most photographed of all the Easter Island statues.
This is just one of those moments of serendipity that makes me want to do the Dippity-Doo.
I was trying to get through the usual abominable trash on The Vintage News (which for some reason keeps dragging me back, though it's about as well-researched and scholarly as Ripley's Believe it or Not) when I came across the beginning of an article on the famed Easter Island statues that was so horribly written, I burst out laughing. I just had to cut and paste the beginning of it, but then, when I went to look for an illustration. . .
It was just too perfect: a giant head that somehow completely lacked a brain.