<P> The average height of the moai is about 4 m (13 ft), with the average width at the base around 1.6 m (5.2 ft). These massive creations usually weigh in at around 12.5 tonnes (13.8 tons) each . </P> <P> All but 53 of the more than 900 moai known to date were carved from tuff (a compressed volcanic ash) from Rano Raraku, where 394 moai in varying states of completion are still visible today . There are also 13 moai carved from basalt, 22 from trachyte and 17 from fragile red scoria . At the end of carving, the builders would rub the statue with pumice . </P> <P> Easter Island statues are known for their large, broad noses and strong chins, along with rectangle - shaped ears and deep eye slits . Their bodies are normally squatting, with their arms resting in different positions and are without legs . The majority of the ahu are found along the coast and face inland towards the community . There are some inland ahu such as Ahu Akivi . These moai face the community but given the small size of the island, also appear to face the coast . </P> <P> In 1979, Sergio Rapu Haoa and a team of archaeologists discovered that the hemispherical or deep elliptical eye sockets were designed to hold coral eyes with either black obsidian or red scoria pupils . The discovery was made by collecting and reassembling broken fragments of white coral that were found at the various sites . Subsequently, previously uncategorized finds in the Easter Island museum were re-examined and recategorized as eye fragments . It is thought that the moai with carved eye sockets were probably allocated to the ahu and ceremonial sites, suggesting that a selective Rapa Nui hierarchy was attributed to the moai design until its demise with the advent of the Birdman religion, Tangata Manu . </P>

Which direction do the easter island heads face
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