The Link to The Guardian's Science Section with this article
My Tumblr Blog with this article
N = N*FQ*FHZ*FO*FL*FS
Such That:
1: The average number of stars to form per year in the galaxy.
2: The fraction of those stars that form planets.
3: The fraction of those planets that could support life.
4: The fraction of life-supporting planets that form life.
5: The fraction of those living planets that develop intelligent life forms.
6: The fraction of those intelligent life forms that develop technology.
7: The average lifetime of a communicating species; in other words how long a civilisation will use radio technology, leaking signals into space for us to hear.
