The Drake Equation, according to the world’s worst encyclopedia is
… a famous result in the speculative fields of exobiology and the search for extraterrestrial intelligence (SETI).
This equation was devised by Dr. Frank Drake (now Professor Emeritus of Astronomy and Astrophysics at the University of California, Santa Cruz) in 1960, in an attempt to estimate the number of extraterrestrial civilizations in our galaxy with which we might come in contact. The main purpose of the equation is to allow scientists to quantify the uncertainty of the factors which determine the number of such extraterrestrial civilizations.
Or at least, that’s what the article said at the precise moment I accessed the page. Who knows what it will say when you do the same?
The Drake Equation is given by the following formula:
where
is the number of civilizations in our galaxy with which we might hope to be able to communicate
and
is the average rate of star formation in our galaxy
is the fraction of those stars that have planets
is the average number of planets that can potentially support life per star that has planets
is the fraction of the above that actually go on to develop life at some point
is the fraction of the above that actually go on to develop intelligent life
is the fraction of civilizations that develop a technology that releases detectable signs of their existence into space
is the length of time such civilizations release detectable signals into space.
The Drake Equation has been criticized by many scientists as meaningless. Michael Crichton in his speech “Aliens cause global warming” says of the Drake Equation:
This serious-looking equation gave SETI [the Search for Extraterrestrial Intelligence, founded by Frank Drake] a serious footing as a legitimate intellectual inquiry. The problem, of course, is that none of the terms can be known, and most cannot even be estimated. The only way to work the equation is to fill in with guesses. And guesses-just so we’re clear - are merely expressions of prejudice. Nor can there be “informed guesses.” If you need to state how many planets with life choose to communicate, there is simply no way to make an informed guess. It’s simply prejudice.
As a result, the Drake equation can have any value from “billions and billions” to zero. An expression that can mean anything means nothing. Speaking precisely, the Drake equation is literally meaningless, and has nothing to do with science [my emphasis]. I take the hard view that science involves the creation of testable hypotheses. The Drake equation cannot be tested and therefore SETI is not science. SETI is unquestionably a religion. Faith is defined as the firm belief in something for which there is no proof. The belief that the Koran is the word of God is a matter of faith. The belief that God created the universe in seven days is a matter of faith. The belief that there are other life forms in the universe is a matter of faith. There is not a single shred of evidence for any other life forms, and in forty years of searching, none has been discovered. There is absolutely no evidentiary reason to maintain this belief. SETI is a religion
Randall Munroe, who draws the consistently brilliant webcomic XKCD, has recently discovered that the Drake Equation is missing a term:
Bad Behavior has blocked 23 access attempts in the last 7 days.
