FROM A CERTAIN POINT IN OTER SPACE, ABOVE THE PACIFIC OCEAN, THE EARTH APPEARS ENTIRELY BLUE . IT IS THE PRESENCE OF LIQUI WATER IN SUCH VAST QUANTITIES THAT MARKS THE PLANET OUT ITS NEIGHBOURS IN THE SOLAR SYSTEM.THE OCEANS SPAWNED THE EARLIEST LIFE FORMS ,AND THEY CONTINUE TO SUSTAIN ALL TERRESTRIAL? CREATURES -MANKIND INCLUDED.