 Farming and animal husbandry, along with monumental burial, polished flint axes and decorated pottery, arrived from the Continent with the Funnel-beaker Culture in c. 4,000 BC.Whether this happened by diffusion of knowledge or by mass migration or both is controversial.Within a century or two, all of Denmark and the southern third of Sweden became neolithised and much of the area became dotted with megalithic tombs.