In a Scottish loch, archaeologists have uncovered an artificial island built by humans more than 5,000 years ago. This fascinating discovery sheds new light on human activity during the Neolithic period.
At the heart of Scotland’s wild landscapes, the lochs still conceal many mysteries. Among them are the crannogs — artificial islands constructed by humans since prehistoric times. These ancient structures have long intrigued scientists. One such site, located on the Isle of Lewis in Loch Bhorgastail, has recently astonished researchers following an in-depth study carried out over several years.
A construction far older than expected
British researchers from the Universities of Southampton and Reading examined the site from every angle in order to better understand its history. The results of their work, published last April by Cambridge University Press, reveal that the Loch Bhorgastail crannog dates back more than 5,000 years.
This dating makes the man-made structure one of the oldest ever identified in the region. It may even have been built before some iconic Neolithic monuments, such as Stonehenge — the ancient site formed of enormous standing stones.
To reach this conclusion, the scientists did not rely solely on traditional excavations, as reported by Geo magazine. They also used radiocarbon dating and stereophotogrammetry, a technique that creates highly accurate topographical maps from aerial imagery. Thanks to this method, the teams were able to distinguish the different layers added over the centuries and gain a clearer understanding of how the Loch Bhorgastail crannog evolved over time.
An island transformed over millennia
Analysis shows that the crannog originally consisted of a circular wooden platform measuring around 23 metres in diameter. Over time, its inhabitants continued to alter the artificial island. Two thousand years later, additional vegetation and stones were added to the original structure. During the Iron Age (from around 800 BC to the end of the 1st century BC), yet another layer of stone was added to strengthen the site.
Researchers also identified an ancient stone causeway linking the crannog to the shore of the loch. Now submerged, this passage once provided easy access to the artificial island.
Evidence of life found beneath the water
Excavations around the site also uncovered numerous Neolithic artefacts. Beneath the water, researchers discovered hundreds of remarkably well-preserved pottery fragments. Several vessels contained traces of food remains and tools. These finds provide valuable insight into the daily lives of the people who once inhabited the area.
Today, specialists believe that this crannog, along with other artificial islands, may have served as communal spaces for a range of collective activities, particularly cooking and food preparation. They may also have hosted important ceremonies and gatherings.
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