In Denmark, a team of archaeologists have been using the help of moles in the area to help dig up a medieval fort. The team had previously been legally unable to dig there because the land is protected by the government. However, the moles dig as they normally would, and archaeologists then sift through mole hills. They find that they moles have brought up pieces of brick and pottery; the archaeologists know when they are closer to where buildings once stood where the mole hills contain increasing amounts of brick. The big advantage here (besides getting around legal troubles) is that the artifacts being dug up by the moles remain unharmed and undestroyed.