always here, so how did that come to be? such a fundamental thing of being human, to wonder about that, thatis being human, to wonder about that, that is what i want to find out. extraordinary that we are here at all, isn t it? extraordinary that we are here at all. isn t it? extraordinary that we are here at all, isn t it? for- extraordinary that we are here at all, isn t it? for now, | all, isn t it? yes, it is. for now, thanks for all, isn t it? yes, it is. for now, thanks forjoining all, isn t it? yes, it is. for now, thanks forjoining us. all, isn t it? yes, it is. for now, thanks forjoining us. i- all, isn t it? yes, it is. for now, thanks forjoining us. i hope i all, isn t it? yes, it is. for now,| thanks forjoining us. i hope you really enjoy what the telescope shows you. it s 73 miles long, runs from tyneside to the solway firth and this year marks the 1900th anniversary of the building of hadrian s wall. it marked the northern boundary of the roman empire, and is one