The museum and several Native Hawaiian groups are struggling to figure out what should be done with 83 objects, including bones and rare carved artifacts taken from sacred burial caves in Kawaihae, on the Big Island of Hawaii in 1905.

NPR: Hidden Treasures: Hawaii Custody Battle

The two institutes have developed compact and portable x-ray devices capable of analysing the structure and chemical composition of ancient bones, buildings, and art objects in a non-destructive fashion.

UNESCO: Basic Sciences

Combined with finds of exotic objects in and around the circles, the evidence from isotope analysis of the bones of animals eaten at these sites points to the fact that people were travelling to get to them.

BBC: Discovering Britain��s prehistoric stone circles