CLARK you are obviously an intelligent person, though a trifle polemic I suspect. Crystal Palace was constructed from cast iron and plate glass not steel. Science theory is just that, a theory.Scientific fact will probably never be established in this case how can it be?As for numbers of for and against, many of our greatest scientist were often found to be in the minority.that is until they proved the majority wrong.I think your input is a worthy stabilising factor in this debate providing balance to a topic that can go off the rails.Thank you.