"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.
It seems that when you have cancer you are a brave battler against the disease, but when you have Alzheimer's you are an old fart. That's how people see you. It makes you feel quite alone.
To be selected was an honor, and in respect of the family member chosen to run, families held feasts and gave away prized beaver coats, quilled tobacco bags and buffalo hides.