Who built Stonehenge and what ancient DNA reveals

HostThose huge grey stones out in the middle of a grass field have been a puzzle for a long long time. It feels like every few years we get a new story about who put them there and what they were thinking. For a long time people talked about old priests or some lost tribe of magicians, but we have much better tools to look back now. We can look at the bones themselves. I want to know what the latest find tells us about the people who actually stood on that ground and moved those rocks. Who were they?

GuestWell, the first thing we have to do is throw away the idea that one single group of people built the whole thing. This project took well over a thousand years. It started as a simple ditch and a bank of earth, and it ended with those massive blocks we see in all the pictures. The DNA tells us that the people who started the work were very different from the people who finished it. The first people to really mark that spot were farmers who came over from the land around the Mediterranean. They arrived in Britain about six thousand years ago. They had pale skin and dark hair, and they were the ones who brought farming to the island. They spent centuries digging the site and setting up the first small stones, which they brought all the way from Wales.

HostWait, I thought the whole point was that it was built by the Druids? That's what we always hear in the old stories.

GuestThat's one of the biggest myths out there. The Druids didn't show up until at least two thousand years after the main stones were already standing. By the time the Druids were around, Stonehenge was already an ancient ruin. No, the real story is much more about moving and swapping. Around four thousand five hundred years ago, right when the biggest stones were being hauled into place, a new group of people arrived from mainland Europe. We call them the Beaker people because of the clay pots they made. These folks had more in common with people from the open plains of the east. They had lighter hair and different DNA markers. And here is the wild part. Within a few hundred years of them arriving, almost ninety percent of the DNA from those first farmers just vanished from the record.

HostThat sounds like a total takeover. Are we talking about a huge war or a fight that wiped everyone out?

GuestWe don't actually see a lot of signs of a big war or mass killings in the bones. It's more of a mystery. It could've been that the new people brought germs and sickness that the locals couldn't fight off. Or maybe they were just much better at farming and had way more kids. But whatever happened, the DNA shows a nearly total swap. It's one of the most sudden shifts in the history of the island. These new people, the Beaker people, were the ones who saw this old sacred site and decided to go big. They were the ones who moved the massive stones that weigh as much as trucks.

HostSo the people who finished the job were basically immigrants who had just arrived a few generations before. But how do we know for sure they were moving around that much? It feels like back then most people would just stay in one spot their whole life.

GuestWe used to think that, but a famous find called the Amesbury Archer changed everything. They found this man buried near Stonehenge with gold hair pins and copper knives. When they looked at his teeth, they found a chemical trace that acts like a map. See, the water you drink as a child leaves a mark in your tooth enamel that never goes away. Different parts of the world have different levels of certain minerals in the rocks and water. This man didn't grow up in Britain. His teeth showed that he grew up somewhere cold, likely in the mountains of central Europe, maybe near the Alps. He traveled hundreds of miles across land and sea to get to Stonehenge.

HostHow can we be so sure about a map in a tooth? That sounds like a bit of a stretch.

GuestIt comes down to basic chemistry. The rocks under your feet leak minerals into the water, and your body picks that up while your teeth are growing. It's a very solid way to track where someone spent their early years. And the Archer wasn't the only one. We see bones from cows at the site too. Those cows were brought from the north of Scotland and from Wales. People were walking hundreds of miles to bring their best livestock for big feasts at the site. Stonehenge was like a giant magnet. It pulled people in from all over. It wasn't a lonely place for a small tribe. It was a hub for the whole region.

HostIt's strange to think that the people we see today in Britain are mostly the family of the people who replaced the first builders. It makes the stones feel even older, like they belong to a world that was lost twice over.

GuestThat's the big takeaway. The DNA shows us that almost none of the people who started the work are the kin of the people living there now.

HostThe stones stayed in the ground while the entire map of human life around them shifted and changed.

GuestThat's it.

HostThe grey rocks out on that plain outlasted the very blood of the people who first dug the ditch.