The age in which we live, this non-stop distraction, is making it more impossible for the young generation to ever have the curiosity or discipline... Because you need to be alone to find out anything.
"Ahu" are stone platforms on which many moai sit. There are 313 known ahu and 125 of these carry moai. The biggest, Ahu Tongariki is 220 m (720 ft), and had the most (15) and tallest moai.