How Did Easter Islanders Lift Statues' 13-Ton Hats? Researchers May Have The Answer

Some ancient statues on Easter Island wear multi-ton stone "hats" known as pukao. A team of researchers say that a technique called parbuckling was most likely used to move the hats into place.

3-D models show that grooves had been worn down the center of the stones, suggesting that a technique known as parbuckling might have been used.

(Image credit: Carl Lipo)

Source: NPR