Real life

Like everyone else I loved Planet Earth (BBC1, Sunday), which came to only a temporary end this week. The images are fabulous. If the global-warming doomsayers are right, and if in 50 years’ time what’s left of us are living on mountain tops, chewing grey squirrels and watching DVDs powered by lichen, it will be a perfect way of remembering what we have lost. Or rather what we never quite managed to catch in the first place. Where, for example, have you been able to see thermal imaging of kangaroos slobbering on themselves to keep cool? It could be number 983 on our cable box: the Kangaroo Saliva Channel, 7.00 to 8.00: Great Expectorations. As computer-generated images become more powerful and more convincing, real life has to struggle to keep up. So we have multicoloured lizards leaping to catch blackfly in South Africa, herds of wild Bactrian camels racing across the snow, and an ibex fight which, if it were made by Sony, might attract a 15 certificate.