Contents.
LIFE ON VENUS: THE INTERPLANETARY TRANSFER OF 8BIOTA FROM EARTH8II. EVIDENCE OF LIFE ON MARS 42
III. MARS: ALGAE, LICHENS, FOSSILS, MINERALS, MICROBIAL MATS, AND STROMATOLITES IN GALE CRATER 83
IV. LIFE ON MARS? COLONIES OF PHOTOSYNTHESIZING MUSHROOMS IN THE EAGLE CRATER. THE HEMATITE HYPOTHESIS REFUTED 173
V. THE ORIGINS AND EVOLUTION OF MARTIAN LIFE 211