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: