A CELL FORMS OUT OF DEAD MATTER. IT MULTIPLIES AND EACH BEGINS TO VARY. TWO CELLS ONCE MERGE INVENTING S*X AND AFTERWARDS MULTICELLULAR LIFE. THIS LIFE DIVERSIFIES FOR SOME OF IT TO INHABIT LAND. OVER TIME, CREATURES GET STARTER AND STARTER BY THE NEW GENERATION. FEW OF THEM SURVIVE MASS EXTINCTIONS BUT THOSE WHO SURVIVE DIVERSIFY. ONE OF THESE CREATURES HAS MUCH EFFORT NATURE PUT IN IT'S BRAIN AND BRAWN. IT BECOMES SMART ENOUGH TO MASTER FIRE, SMELT METALS AND BUILD SOCIETIES.