The famous statues of Rapa Nui, or Easter Island, are best known for their deep-set eyes and long ears.
They also sport impressive multi-tonne hats made from a different rock type.
Quite how these pukao, as they are known, were transported and placed atop the statues has long been a puzzle.
But now American archaeologists believe they have a clearer understanding. The giant hats were moved with minimal effort and resources using a ramp and rope technique ... Read even more
