The North Sea Is Hiding a Whole Country Beneath It

Sixteen thousand years ago, you could walk from England to Germany. Through oak forests, past wild boar and bears, along a river nobody alive has ever seen. That country is now under the North Sea, and scientists just found its DNA.

The findings come from sedaDNA pulled from 41 marine cores drilled in southern Doggerland. A University of Warwick team analyzed the samples and found temperate trees — oak, elm, hazel — growing there more than 16,000 years ago. That matters because the scientific consensus before this research held that southern Doggerland was tundra at that time, with ice sheets reaching down to what is now the Scotland-England border.

It wasn't tundra. Researchers found evidence of boars, deer, bears and aurochs — animals that require canopy cover and dependable food sources. The forest was there, and it was doing real ecological work.

Among the finds: DNA from Pterocarya, a walnut relative scientists believed had disappeared from northwest Europe some 400,000 years ago. Its presence suggests this region functioned as a microrefugium: a pocket of shelter where species rode out conditions that scrubbed them from everywhere else. Researchers believe this could help explain how forests spread so rapidly across northern Europe after the ice retreated, a question scientists have debated for decades.

Parts of Doggerland remained above sea level longer than previously thought, surviving major flooding events including the Storegga tsunami around 8,150 years ago before finally disappearing beneath the North Sea roughly 7,000 years ago. Britain's sparse early settlement record now looks less like a mystery of absence and more like a problem of lost ground. Rising seas drowned the routes, camps and shorelines that once sat on Doggerland.

The evidence was there the whole time, sitting in the sediment. It just needed someone willing to drill for it.

Read the full story at Discover Wildlife, March 18, 2026

Hot Take: The history of early human settlement in Britain has a conspicuous gap right where the most hospitable land used to be, and geologists have spent decades assuming the gap was a data problem. Turns out the data is under 100 feet (30 meters) of seawater, and the real problem was asking the wrong ocean floor.