Proof of aliens within 25 years? What's the basis for this optimism?
Well, of course, it's the Drake equation. It had to be. While it is certainly reasonable that everyone has their own perspective and opinion about the likelihood of alien life, it is not reasonable to pretend that the "Drake equation" provides some sort of inside track.
The article, "Proof of Aliens Could Come Within 25 Years, Scientist Says", lays claim to Carl Sagan's "calculation" of N = 1,000,000, while Drake himself places the value much lower at 10,000. So with two orders of magnitude separating the "calculations", we're to believe that such speculation has merit because of the Drake equation?
I would suggest that one cannot legitimately claim the calculating power of an equation if the terms aren't defined. Therefore regardless of the results produced by the Drake equation, the simple reality is that it is ultimately no different than using a Ouija board to make predictions. It's not a theory, it's not even a hypothesis. It's merely a collection of terms that suggest what needs to be considered before attempting to establish a probability of intelligent life.
Of course, the most obvious consideration is that it might not even be remotely accurate.
Historically Drake used the following values for his calculation in 1961:
* R* = 10/year (10 stars formed per year, on the average over the life of the galaxy)
* fp = 0.5 (half of all stars formed will have planets)
* ne = 2 (stars with planets will have 2 planets capable of developing life)
* fl = 1 (100% of these planets will develop life)
* fi = 0.01 (1% of which will be intelligent life)
* fc = 0.01 (1% of which will be able to communicate)
* L = 10,000 years (which will last 10,000 years).
Drake's values give N = 10 × 0.5 × 2 × 1 × 0.01 × 0.01 × 10,000 = 10.
So I would suggest that before we simply plug in more numbers and do the calculations, let's test one of the most obvious terms in the equation. The third term (ne) indicates that of the stars with planets, two planets will be capable of developing life. This is clearly a testable hypothesis. We can use our own solar system. So I would suggest that before we start planning the dinner party we're going to throw for the first aliens, perhaps a more modest goal would be to see if we can find even one more planet in our solar system that has life.
That would be a sufficient factor in deciding whether the rest of the Drake equation has any possible merit at all. In addition, it would be a strong reality check on what finding an alien life form really represents.
- PHYSICAL SCIENCES
- EARTH SCIENCES
- LIFE SCIENCES
- SOCIAL SCIENCES
Subscribe to the newsletter
Stay in touch with the scientific world!
Know Science And Want To Write?
- The BPA Paradox – Too Many Studies?
- Part I: Bee Deaths Mystery Solved? Neonicotinoids (Neonics) May Actually Help Bee Health
- 3X Saturated Fat In The Diet Doesn't Increase It In Blood
- Is Religion A Consolation Worth Having?
- GMO Labels Are Good For The $105 Billion Organic Industry - But No One Else
- Microwave Electron Guns: A Field-Emission Plug-And-Play Solution
- In A Snowstorm, Do You Want Salt Or Vegetable Juice On Your Road?
- "We've completely lost our sense of sanity and the important consumer protections against false..."
- "I work in medical research, where we have a different way of dealing with these statistical issues..."
- "Hi PH,no, the topic is really a different one... Naturalness in fundamental physics has nothing..."
- "Right, that's a sort of typo - I confuse the two numbers often.T...."
- "Glad to see I wasn't the only one who thought these authors were trying to fight against corporations..."
- Clipping proteins that package genes may limit abnormal cell growth in tumors
- Investigational drug reduces high potassium levels in chronic kidney disease patients
- Study: Doubling saturated fat in the diet does not increase saturated fat in blood
- Women with serious mental illness less likely to receive cancer screenings
- Only half of patients take their medications as prescribed