Ah, Stonehenge. This ancient rock monument has attracted the fascination of archaeologists and historians ever since John Aubrey gave it a once-over back in the 17th century.
And it doesn't take long to list some of the biggest questions we've always had about it. Where did these rocks come from? How did they get there? Who put them together like this? And, perhaps most curious of all, why?
Well, it's taken a lot longer to answer these questions than it has to ask them, but Mike Parker Pearson and his associates have nailed down a very important piece of the puzzle that will make it a lot easier to answer the questions that remain.
His newest article in the archaeology journal Antiquity shows compelling evidence that we've finally got a fix on the origin of the Stonehenge rocks, which are the key to its greatest mysteries.
1. But Pearson's team didn't just pull the answer out of thin air.
2. Thanks to the discovery of ancient bluestone quarries like this one in 2011, now we know exactly where the stones are from.
3. So what's so special about the quarry at Craig Rhos-y-felin?
4. You might notice that it's a match for the rock marked "11" in this photo.