Edit. J. M. Dent & Sons Ltd., 1978 London. 4ºm (24x16cm). 189 págs. Cartoné con sobrecubierta ilustrada. Sobrecubierta deslucida. Signos de uso. «The origins of biology occurres not on Earth but in far-flung parts of the galaxy. Interstellar space is full of prebiotic molecules… the origing of life on Earth involved a piecing together of interstellar prebiotics. In the early days soft landings of comets brought about the spreading of water and other volatiles over the Earth’s surface. Then about four billion years ago life also arrived from a lifebearing comet.»