There is a plant, called Welwitschia mirabilis (mirabilis being Latin for marvelous), found only one place on earth, in a desert in Namibia. When you finally get to see one, sits apart. It’s very alone. All its relatives, its cousins, nieces, nephews have died away. It is the last remaining plant in its genus, the last in its family, the last in its order. “No other organism on earth can lay such a claim to being ‘one of its kind,’ ” writes biologist Richard Fortey.