Adam Roberts turns his attention to answering the Fermi Paradox with a taut and claustrophobic tale that echoes John Carpenter's The Thing.Two men while away the days in an Antarctic research station. Tensions between them build as they argue over a love-letter one of them has received. One is practical and open. The other surly, superior and obsessed with reading one book - by the philosopher Kant.As a storm brews and they lose contact with the outside world they debate Kant, reality and the emptiness of the universe. They come to hate each other, and they learn that they are not alone.