ang: This is pretty interesting. Look at this.
tom: what's that?
ang: i'm looking at this website about the statues on Easter island. It says they've found almost 900 statues.
tom: no way
ang: Yes. most of the statues face Easter island. only a few of them face the sea.
tom: when did the Easter island make them ?
ang: let's see ... about 500 to 750 years ago.
tom: they look so heavy, don's they ?
ang: Yes, they do.
tom: how did they move them?
ang: i really don't konw. but let's see if we can find out.