So it’s an average of the different isotopes that can be found? That’s interesting, I wonder how they work out that average. Do you have to take samples all over the world?

Thanks for explaining this. So were there many Roman citizens in Britannia, or was it a pretty small ratio of Romans to locals? Did the Roman soldiers give commands to the local elites, who would then tell the locals what to do? And would you say that life changed much for the locals under the new rule?

What do you mean by active listening exactly?