"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.
The largest tooth of any carnivorous dinosaur found to this date is that of a T-Rex. It is estimated to have been around 30cm (12in) long when including the root.