Life in the universe - Drake equation
There is this very interesting equation invented by Frank Drake in 1961.. It goes like this:
N = R* × fp × ne × fl × fi × fc × L
Where,
N = The number of communicative civilizations
R* = The rate of formation of suitable stars
fp = The fraction of those stars with planets
ne = The number of "earths" per planetary system
fl = The fraction of those planets where life develops
fi = The fraction life sites where intelligence develops
fc = The fraction of planets where technology develops
L = The "Lifetime" of communicating civilizations
I took this from http://www.seti-inst.edu/science/drake-bg.html and from that page there is a link to Drake Equation Calculator, which -that's right, you guessed it- lets you enter values for those variables and then counts out N.
Who still says there are no aliens? ;)
-ZeroOne :cool: