Bold statement: The Hjortspring boat isn’t just an ancient relic—it’s a groundbreaking clue that rewrites how we view early Scandinavian seafaring and long-distance connections. And this is the part most people miss: new scientific analyses are widening the timeline and geography of where these raiders came from, reshaping Bronze–Iron Age histories across Northern Europe.
Researchers have long studied the Hjortspring boat, a plank-built vessel found in a Danish bog and famous for carrying a cache of weapons that testified to a dramatic raid on the island of Als, ultimately foiled by defenders who sank the ship. The vessel sat silent for more than two thousand years until its excavation, and many questions about its origins remained unanswered—until now.
A recent study published in PLOS ONE offers fresh radiocarbon dating and material analysis, suggesting the boat traveled farther than once thought. Lead author Mikael Fauvelle of Lund University notes that during the Bronze Age, Scandinavians needed sea routes to obtain copper and tin for bronze, which were not mined locally. This positions the Hjortspring boat as a culmination of one of Scandinavia’s early maritime cultures and as a bridge to understanding both Bronze Age seafaring and the beginnings of Iron Age seafaring.
Among the study’s surprising discoveries is a partial human fingerprint preserved on tar fragments from the boat. This rare find could provide a direct link to one of the original sailors, offering a unique human connection to an ancient voyage.
Before sinking, the Hjortspring boat stretched nearly 20 meters (about 66 feet) and could carry up to 24 men. Today it is housed at the National Museum of Denmark in Copenhagen. The craft is built from a bottom plank sewn to two side planks, with curved extensions at both ends. Coauthor Flemming Kaul emphasizes that Hjortspring is the oldest well-preserved plank-built boat in Northern Europe and a testament to the sophisticated shipbuilding skills of Scandinavia’s early Iron Age.
The story of origin continued to be refined in 2024 when researchers revisited caulking and cordage that accompanied the vessel but had remained unanalyzed for decades. Earlier assumptions that the caulking came from local materials, such as linseed oil or cow fat, were replaced with evidence of a mixture of animal fat and pine pitch. The use of pine pitch points to possible construction centers outside Denmark, perhaps in Baltic coastal regions where pine forests were more common. If true, this implies a long, deliberate voyage by raiders, not a spontaneous raid.
Fauvelle explains that this finding shows Scandinavian seafaring has deep roots in both raiding and trading, rooted in extensive long-distance networks long before the Viking era. The study also highlights the region’s interconnected nature—political ties and commercial links likely crossed substantial distances, shaping how communities interacted across the Baltic, North Seas, and Skagerrak.
Ole Kastholm, an expert in ancient seafaring and a Roskilde Museum researcher who was not part of the study, welcomes the pine-pitch discovery. He notes that past people could and did navigate open, small- to mid-sized vessels—whether logboats or plank-built ships like Hjortspring—across broad seas. He also stresses the importance of preserving museum artifacts, since modern methods can reveal new information from items once considered exhausted of data. Kastholm hopes ongoing research might eventually pinpoint Hjortspring’s exact geographic origin.
The 2024 analysis also revived the radiocarbon dating using intact cordage found with the boat, aligning with earlier estimates that place the vessel in the fourth or third century BCE. The tar’s partial fingerprint, meanwhile, remains a remarkable and rare human link to the ship’s construction and use.
Looking ahead, researchers aim to extract ancient DNA from the tar to help identify raiders’ origins more precisely. They’re also exploring X-ray scans of the wood to read tree rings, which could yield more precise dating and sourcing clues.
Ultimately, Kaul emphasizes that the Hjortspring find reveals how conflict, strategy, and maritime activity shaped the Early Iron Age in Northern Europe. The study invites continued exploration of maritime history as a core component of South Scandinavia’s prehistory, underscoring that control of sea routes has long mattered for trade and power just as it does today.
Taylor Nicioli is a freelance journalist based in New York.
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