it was thrown away in, under the ground where we re standing, which is an incredible opportunity. just think of the range of stuff that we could be standing on right now, and what kind of story that can tell us about life here almost 2,000 years ago. we ve got something called a pesometer, which measures what s going on right under the ground. the question is, how quickly this archaeological resource is being lost? one thing the water level is monitoring, basically also the temperature down there. to find out, they ve dug boreholes and monitor what s happening to the water on the site hour by hour. and in a freezer at teesside university, they keep samples of the soil. so we re taking out one of our examples that we obtained it at carvoran at the roman army museum on hadrian s wall. taking it out of the freezer. now that s stored at minus 80, is it? minus 80. hence why specifically, we re looking at moisture levels,