Places such as Purgatory Chasm and Millstone Hill, in Worcester's Green Hill Park, bear witness to the work of the glaciers.

Scientists agreed the rocky outcrops in a remote part of Quebec, Canada, were ancient. But were they really Earth’s oldest?

In this episode, we uncover hidden gold inside large quartz rocks - using nothing but our trusty metal detectors and some good old-fashioned hard work. With the help of the Minelab Gold Monster ...