continental Europe. They subsequently replaced most of the hunter-gatherer population in the British Isles without mixing much with them. At that time, Britain was inhabited by groups of hunter-gatherers who were the first inhabitants of the island after the last Ice Age ended about 11,700 years ago. Despite their mostly Aegean ancestry, the paternal (Y-DNA) lineages of Neolithic farmers in Britain were almost exclusively of Western Hunter-Gatherer origin. This was also the case among other megalithic-building populations in northwest Europe, meaning that these populations were descended from a mixture of hunter-gatherer males and farmer females. This mixture appears to have happened primarily on the continent before the Neolithic farmers migrated to Britain. The dominance of Western Hunter-Gatherer male lineages in Britain and northwest Europe is also reflected in a general 'resurgence' of hunter-gatherer ancestry, predominantly from males, across western and central Europe in the Middle Neolithic. The Bell Beaker people arrived later, around 2,500 BC, migrating from mainland Europe. The earliest British beakers, most likely speakers of Indo-European languages whose ancestors migrated from the Pontic–Caspian steppe, were similar to those from the Rhine. There was again a large population replacement in Britain. More than 90% of Britain's Neolithic gene pool was replaced with the arrival of the Bell Beaker people, who had approximately 50% WSH ancestry. The Bell Beakers also left their impact on Stonehenge construction. They are also associated with the Wessex culture. The latter appears to have had wide-ranging trade links with continental Europe, going as far as Mycenaean Greece. The wealth from such trade probably permitted the Wessex people to construct the second and third (megalithic) phases of Stonehenge and also indicates a powerful form of social organisation. The Bell Beakers were also associated with the tin trade, which was Britain's only unique export at the time. Tin was important because it was used to turn copper into bronze, and the Beakers derived much wealth from this. Modern history Folklore "Heel Stone", "Friar’s Heel", or "Sun-Stone" The Heel Stone lies northeast of the sarsen circle, beside the end portion of Stonehenge Avenue. It is a rough stone, above ground, leaning inwards towards the stone circle. It has been known by many names in the past, including "Friar's Heel" and "Sun-stone". At the Summer solstice an observer standing within the stone circle, looking northeast through the entrance, would see the Sun rise in the approximate direction of the