Nokia had us fooled two days ago when they lured us with the prospect of winning their latest premium phone by guessing an element that “endures the passage of time” and “is coveted for its style and elegance”. Our editorial team spurted guesses of “gold”, “water” and even “love”. It turned out that the answer was carbon, and the phone was the Nokia 8800 Carbon Arte. We’re still grouchy about our loss so we would like to say the phone isn’t exactly made of carbon, but a mixture of carbon fibre, titanium, polished glass and stainless steel.