Stonehenge: could core sample missing for 60 years hold answer to site's secrets?

Sample removed during 1958 restoration has been returned and is being tested to help determine stones’ source

A piece of Stonehenge that vanished from the ancient site more than 60 years ago during restoration work – and has since travelled across the Atlantic and around the US with the man who took it as a souvenir – has finally been returned.

The pristine-looking core of one of the giant sarsen stones may now help scientists pin down one of the mysteries of the site – where the imposing hunks of sandstone came from.

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from The Guardian http://bit.ly/2JpP6lq