15.20
Existence of type IV, V and VI civilizations in the Milky Way
  
  In the previous few chapters we established that no stellar system (single, double or triple star system) can be born without planets & moons ( non-photon producing mass systems).  
  We were able to show that the uniformity of star creation is such that all stars in the universe can be classed according to the age, current personality and cycles of life. The common patterns between stars enables us to class and identify literally thousands of stars for almost each and every category.  
  Similarly, we were able to show that the formation of planets and moons of each and every stellar system share similar commonalities of pattern, size, position and lifecycles.  
  Therefore, we should (in theory) be able to eventually develop techniques to identify and class the planets and moons of nearby stellar systems according to common categories of shape, structure and personality.  
  We then established that every stellar system where at least one star exists in hydrogen to helium cycle, planets/moons will exist with water based environments to some extent. In our solar system alone, three planets/moons have significant water based environments (Earth to the Sun, Europa to Jupiter, Titan to Saturn).  
15.20.1 The existence of carbon-based life on planets/moons in the Milky Way  
  Given the estimated number of stars in the Milky Way is between 100 and 200 Billion, and the possibility of more than one environment per stellar system capable of sustaining life, that the number of life bearing planets/moons in the Milky Way alone probably exceeds 50 Billion.  
15.20.2 Carbon-based life versus non-carbon based life  
  We also established that Carbon based life is the common standard across the Galaxy for naturally occurring life, as Carbon is the only element that enables both stable molecular environments and the bonding strengths of non spherical structures. Silicate life can and does exist ( e.g. computers). However, its abundance depends upon the direct intervention of carbon based life to provide development.  
15.20.3 The existence of Type IV, V and VI higher order civilizations  
  In terms of the evolutionary path of life on Earth, we saw the emergence of species with brains around 600 million years after the second great cataclysmic asteroid shower that froze the planet.  
  We now know that our solar system is about 5 to 6 billion years old and that the Galaxy is about 14 to 15 billion years old. We also now know that stars are formed at the edge of the galaxy and slowly spiral inwards towards the great attractor of a combined and massive great attractor- Neutron star that eventually destroys old solar systems, creating massive amounts of radiation, then leaking back out of the centre of the galaxy.  
  We also know the relative distances between the solar system and the newest parts of the galaxy and the older parts. The older solar systems are closer towards the centre of the galaxy and the younger solar systems towards the edge of the galaxy.  
  For every 10,000 light years closer to the centre of the galaxy, the stars are around 3 billion years older. For every 10,000 light years further away from the centre of the galaxy, the stars are 3 billion years younger.  
  The life expectancy of stars  
  We now understand the life expectancy of stars as well. Yellow Dwarfs have a life expectancy of 8 to 10 billion years in their present state. yet we have also discovered that Hydrogen Stars are not the only stars capable of sustaining life to planets. Carbon stars, Oxygen stars too, have the potential to sustain life at much large distances (up to 2 Billion light years away from their location).  
  The relative stability of an older or younger solar system and therefore sustained growth of life  
  The Earth has been hit by at least six cataclysmic events. From what we can see asteroid hits are a common feature for all planets. However, an ocean planet that has managed to avoid one less hit, might have enjoyed a further period of uninterrupted growth of life. This could be both towards the edge of the galaxy and towards the centre of the galaxy. On Earth, life started relatively early after the environment conducive for life emerged.  
  Within a few hundred million years, specialized higher order life forms emerged to present the dinosaurs.  
  Importantly though, higher order life forms can only continue if the environment is conducive. There have been a number of cataclysmic events in the history of life on Earth via comets and asteroids hitting the Earth and causing life to cease for a wide area.  
  If these interruptions did not occur, humans almost certainly wouldn't have been the most advanced higher order life form, but those that did emerge from the dinosaur or earlier periods if life was uninterrupted would have reached specialized higher order structures sooner.  
  In terms of evolution, we are looking at possibly two, maybe even three million years earlier than now.  
  When scientists and philosophers talk about the possibility of intelligent life in other parts of the galaxy, they forget that life on Earth has been dealt a few curve balls along the way. Life on Earth has had to go back to close to square one on several occasions.  
  If a planet conducive to life was relatively untouched in another part of the galaxy, even if conditions conducive for life didn't stabilize for some years, then there is no doubt they could develop their culture and be further along the evolutionary curve than the human species.  
  Given the false starts of life on Earth and statistically that life in other parts of the galaxy may have had a better ride, life on Earth almost certainly is not the most advanced life form in the galaxy.  
  It is impossible to predict where the human race would be on a sliding scale. It maybe that we are towards the middle. or quite possibly, way down at the starting gates. Only time will tell.  
     
 
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