Glass, made in antiquityGlass is one of the most intriguing materials we know, combining a number of attractive properties. Sometimes its colours are mesmerizingly beautiful, at other times we wonder at its transparency. It seldom reacts with other substances and so does not absorb odours. A disadvantage is its fragility. But it does recycle well something the ancients already knew (and put to good use?). For them too, particularly in Roman times glass played an important