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ARCHAEOLOGY

Who were the first Scandinavians? Ancient DNA sheds light on mysterious origins

Jan Apel, senior archaeology lecturer at Lund University, explores the origins of the first Scandinavians in this piece first published by The Conversation.

Who were the first Scandinavians? Ancient DNA sheds light on mysterious origins
Skeletal fragments from Hummervikholmen, one of sites featured in this study. Photo: Beate Kjørslevik

Tracking the migration of humans isn't easy, but genetics is helping us uncover new information at breathtaking speed. We know that our species originated in Africa and likely reached Europe from the southeast no later than 42,000 years ago. During the last ice age some 33,000-20,000 years ago, when a permanent ice sheet covered northern and parts of central Europe, modern humans in southwest Europe were isolated from groups further to the east.

When the ice sheet retreated, some of these hunter gatherers eventually colonized Scandinavia from the south about 11,700 years ago, making it one of the last areas of Europe to be inhabited. But exactly who these individuals were and how they got there has remained a puzzle for researchers. Now we have sequenced the genomes of seven hunter gatherers, dated to be 9,500-6,000 years old, to find out.

One of the reasons the origins of the first Scandinavians is so enigmatic is a major shift in stone tool technology that appeared soon after they got there. This new technology seemed to have had an origin in eastern Europe and it has been an open question how it reached Scandinavia.

Early migration

Our interdisciplinary research team combined genetic and archaeological data with reconstructions of the ice sheets to investigate the earliest people of the Scandinavian peninsula. We extracted DNA for sequencing from bones and teeth of the seven individuals from the Norwegian Atlantic coast and the Baltic islands of Gotland and Stora Karlsö.

We then compared the genomic data with the genetic variation of contemporary hunter gatherers from other parts of Europe. To our surprise, hunter gatherers from the Norwegian Atlantic coast were genetically more similar to contemporaneous populations from east of the Baltic Sea, while hunter gatherers from what is Sweden today were genetically more similar to those from central and western Europe. One could say that – in Scandinavia at that time – the geographic west was the genetic east and vice versa.

This contradiction between genetics and geography can only be explained by two main migrations into Scandinavia. It would have started with an initial pulse from the south – modern day Denmark and Germany – that took place just after 11,700 years ago. Then there would have been an additional migration from the northeast, following the Atlantic coast in northern Finland and Norway becoming free of ice.


Artist's impression of the last ice age. Photo: wikipedia, CC BY-SA

These results, published in the PLOS Biology, agree with archaeological observations that the earliest occurrences of the new stone tool technology in Scandinavia were recorded in Finland, northwest Russia and Norway – dating to about 10,300 years ago. This kind of technology only appeared in southern Sweden and Denmark later on.

Blue eyes, blonde hair

Knowing the genomes of these hunter gatherer groups also allowed us to look deeper into the population dynamics in stone age Scandinavia. One consequence of the two groups mixing was a surprisingly large number of genetic variants in Scandinavian hunter gatherers. These groups were genetically more diverse than the groups that lived in central, western and southern Europe at the same time. That is in stark contrast to the pattern we see today where more genetic variation is found in southern Europe and less in the north.


Axe, fish hook and other stone tools from the earliest Scandinavians, found in a cave on Gotland. Photo: Via Jan Apel

The two groups that came to Scandinavia were originally genetically quite different, and displayed distinct physical appearances. The people from the south had blue eyes and relatively dark skin. The people from the northeast, on the other hand, had a variation of eye colours and pale skin.

Originally, humans are a species from warmer climates closer to the equator and we mainly cope with challenging environments with specific behaviour and technology. This includes making fires, clothes and specialized hunting equipment. However, in the long term there is also potential for adaptation through genetic changes.

For example, we found that genetic variants associated with light skin and eye pigmentation were carried, on average, in greater frequency among Scandinavian hunter gatherers than their ancestors from other parts of Europe. Scientists believe that light skin pigmentation helps people better absorb sunlight and synthesize vitamin D from it.

That suggests that local adaptation to the high-latitude climate associated with low levels of sunlight and low temperatures took place in Scandinavia after these groups arrived. In fact, this is in agreement with the worldwide pattern of pigmentation decreasing with distance to the equator.

Modern people of northern Europe trace relatively little genetic ancestry back to the early Scandinavians studied by us. That's because several later migrations have changed the Scandinavian gene pool over time. We know that migrations during the later stone age, the bronze age and historical times have brought new genetic material as well as novel technologies, cultures and languages.

The ConversationThe picture is similarly complex in other parts of the world. Hopefully it won't be long before genetics helps us work out the detailed picture of exactly how humans have spread across the world since we first emerged.

Jan Apel, Senior Lecturer of Archaeology, Lund University

This article was originally published on The Conversation. Read the original article.

LANGUAGE AND CULTURE

Why is Sweden called Sweden? The Local answers Google’s questions

Why is Sweden called Sweden? Why is Sweden so depressing? Why is Sweden so rich?  In a new series of articles, The Local answers some of the most common questions that appear when you type "Why is Sweden..." into the Google search engine.  

Why is Sweden called Sweden? The Local answers Google's questions
Why is Sweden actually called Sweden? Let's find out. Photo: Google screenshot

The short answer to “why is Sweden called Sweden?” is that it’s not. It’s called Sverige

When The Local asked Henrik Williams, a Professor of Scandinavian Languages at Uppsala University, he also gave the question a short answer: “Because it’s inhabited by Swedes.” 

We can trace some form of the name back to at least the 13th century, when it was called Swearike in Old Swedish. That translates to “the kingdom of the Swear”.

Two thousand years ago, some of the people living in what is now known as Sweden were called Svear or Suiones, depending on which language you spoke and on how you spelled things (spelling varied greatly). 

The Roman historian Tacitus gives the first known description of the Svear in a book written in the year 93 CE, Germania

Everything comes down to this word, Svear, the name of the people. It means ‘we ourselves’. The Svear lived in Uppland just north of where Stockholm is now, until about the 11th century when they started expanding their territory. 

“It’s very common that people call themselves, either ‘we ourselves’ or ‘the people’” said Professor Williams. 

“We are ‘the humans’ and everybody else is something else. Everyone else is ‘them'”.

Of course, nobody uses the word in that way now, but it still forms the basis of the word Sweden.

The 8th century epic poem Beowulf gives the earliest known recorded version of the word Sweoland, land of the Swear

But at that time, there was no Sweden. Instead, the land was occupied by little kingdoms of Swedes and Goths (in present-day Götaland) and warring tribes of Vikings.

It’s unclear when the King of the Swear started referring to himself as the king of a country called Sweden, but it was probably around the time the country adopted Christianity in the 11th century. 

“Sweden” only came into regular use after 1750, when it replaced “Swedeland” in English. But in Scotland, “Sweden” had been used since the beginning of the modern era.

According to the Oxford English Dictionary in the early 17th century, people would use Sweden as the name of the people, and Swedeland as the name of the country. 

The first attested use of ‘Sweden’ was in a Scottish timber accounting log in 1503, which refers to “Sweden boards.” 

Most countries went from the Old Norse word Svíþjóð (which is still used to describe Sweden in Icelandic today) and turned it into something in their own languages, like the Old English Swíoríce, the Middle Dutch Zweden and High German Schweden

But it’s not called Sweden everywhere. 

In Finnish, Sweden is Ruotsi, in Estonian it’s Rootsi, and in Northern Sami Ruoŧŧa.

This comes from the root-word Rod, as in modern day Roslagen the coastal part of Uppland. It means rowing, or people who row. And because Finland was invaded by people from Roslagen, that’s how Finns referred to them. 

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