Aliens (CM)

An absurdity to some, a reality to others, the idea of extraterrestrials have captivated people's interest for centuries, and even more so in the modern world. The origins of people's belief ranges from solid scientific reasoning, to poor education, to downright psychosis. People's disbelief usually stems from internal skepticism, solid scientific reasoning, and in some cases, religion. I myself fall on the "believe" side, I hope for solid reasoning. To expound on that hopefully solid reason, I would like to begin with a staple of extraterrestrial belief, Drake's Equation. 

(Bad copying srry D: Please click the image)

R_* = the average rate of star formation in our galaxy

f_p = the fraction of those stars that have planets

n_e = the average number of planets that can potentially support life per star that has planets

f_l = the fraction of planets that could support life that actually develop life at some point

f_i = the fraction of planets with life that actually go on to develop intelligent life (civilizations)

f_c = the fraction of civilizations that develop a technology that releases detectable signs of their existence into space

L = the length of time for which such civilizations release detectable signals into space 

Through a series of very complicated estimations, and some very simple multiplication, the current answer comes out to be 36.4 million at current estimates. However, this is still not really the point of the equation. The point is to show how improbable it is that life doesn't exist elsewhere. When thought about, even only our galaxy is an incomprehensibly large place containing an estimated 300 Billion stars. If the majority of those stars have planets orbiting them, and in all of those solar systems there is the "Goldilocks" zone, where the heat from the sun is neither too cold nor too hot. In a galaxy and universe full of elements waiting to be formed into planets, than it would seem highly probable that a significant number of planets have formed in this zone. These planets would have been very similar, if not identical to the early conditions of our planet. The aliens, you might be wondering, come in not long after this. Though the molten and volcanic early planet may seem inhospitable, in 1953 Stanley Miller proved that organic compounds such as amino acids would be formed by running electric current through an abiotic chemical environment, one that would closely resemble the atmosphere of early Earth. This process, as I sit here typing my highly abstract thoughts into my semi-conductor powered electric computation machine, obviously works. 

As another point of information is the discovery of several "super-Earths" relativity close  to our solar system. These planets are larger than ours, but are in the same "Goldilocks" zone, and NASA says, are potentially habitable.

If this is what lies within our small view of the Universe from here on Earth, I can hardly imagine what lies outside it. 

http://www.space.com/20720-earth-like-alien-planets-discovery.html  

http://en.wikipedia.org/wiki/Drake%E2%80%99s_Equation