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Deeper underground: Inside Grime鈥檚 Graves
Grime's Graves, near Thetford, is Britain鈥檚 only open Neolithic flint mine and holds some amazing history.
Edd Smith met Jennifer Wexler to find out more and hear how 4000 years since they created its current custodians are looking to the future.
(Photo credit: Edd Smith/大象传媒)
