"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.
In the UK, there are more than 1,300 puppies which are bred each year to become guide dogs. These dogs are trained by professionals and then spend their lives guiding and comforting their blind owners.