I wonder if we will ever learn that there are billions of Matrioshka Brains in the Milky Way, most of them far from the galactic center.  We currently call them dark matter.

If I had my choice of where to live in the Milky Way I would want to be as far as possible from the monster black hole at its center.

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I predict 2 types of responses:  pathological rejection and people who equate this with sentient space faring beings.

Frankly I think panspermia is the only theory of evolution which makes much sense.  Integrate evolution over 10 billion planets and 10 billion years and you get believable statistics.

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Exoplanets.org has a list of known exoplanets, and it is sortable by the semi-major axis.  Click on that column to sort the exoplanets by their distance from the primary.

Jupiter is about 5 astronomical units (AU) from our G-type star.  Here are the first 4 likely candidates.

590 light years away near Pavo is HD 190984 , an F8 star with a big planet at 6 AU.

40 ly away is 55 Cancer, a G8 star with a big one at 5.9 AU.

At 85 ly in Libra, HD 134987 is a G8 star with a planet 0.8 Jupiter masses at 5.8 AU.

49ly away mu-Ara is a G3 star with a planet twice the mass of Jupiter at 5.3 AU.

Statistically speaking these are outstanding targets for hosting alien life.  A more detailed analysis may preclude one or more of these due to orbital eccentricity, other planets, or binary star systems.  But if spontaneous generation of life is common then at least one of these systems hosts alien life.

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All chemical reactions have a rate.  That rate has an exponential dependence on temperature as described by the Arrhenius equation.

rate = A exp (-Ea/kT)

Ea is the activation energy, k is Boltzmann’s constant, T is the temperature, A is the pre-exponential factor

Chemical activation energies are best measured in electron-volts or eV.  Typical values are between 1 and 3 eV, usually closer to 2.0.  The ground temperature on Titan is around 94 oK or -179 oC.

Thus a chemical reaction on Titan would be roughly 73 orders of magnitude slower than the same reaction on Earth (298 oK).  So a reaction which takes a microsecond on Earth would require 10^60 years on Titan. (That’s 1000000000000000000000000000000000000000000000000000000000000 years).

Pre-exponential factors for chemical reactions have a certain value which represents steric  effects.  They cannot be 60 orders of magnitude larger because molecular geometry is not that pliable.

Traditional chemical reaction based life is impossible on Titan or any other location where the temperature is so far below 298 oK.

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From their announcement:   At our Celebrating Science 2010 Family Science Faire, you will have the opportunity to meet SETI Institute scientists and discover what the future holds for SETI and astrobiology. Learn about the SETI Institute’s pioneering exploration of life, our solar system, and beyond, including the search for signals from other civilizations.

Your opportunity for hands-on science! We will have fun, interactive activities for youth aged 8-15. They will be able to sign up on a first-come, first-serve basis for educational science-based activities. We will also have fun and creative activities for our younger up-and-coming scientists.

Meet the father of SETI and author of the Drake Equation, Dr. Frank Drake. Visit the gift shop for a Drake Equation t-shirt and ask Dr. Drake himself to sign it!

Hear Seth Shostak speak at 2:45 on “Why Your Grandkids Will Live in Space.” Dr. Shostak will be available to autograph his latest book, Confessions of an Alien Hunter.

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If organic molecules are so prevalent where are all the intelligent space-faring aliens ?  The lack of evidence for aliens is strong evidence that we are alone, the random evolution of intelligent life is so rare that we are the only ones in the entire galaxy.  Note that this is not the same as saying “the random evolution of life is rare”.  There probably are bacteria in most solar systems.

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I’m in the opposite category, despite my faith I say “There are no aliens in this galaxy, prove me wrong.”   It’s unreasonable to say that even one other intelligent species evolved in our galaxy because that requires wild coincidences about why they aren’t here.  Some of those coincidences say:

1 They evolved at almost exactly the same time as we did (beating the odds of 13 billion to one)

2  they aren’t explorers, they just stayed home, and they never sent out robotic exploration ships

3  they killed themselves (war, suicide, plague) before launching robotic exploration machines

4  they all died because of natural events (asteroids, supernovae, plague) before launching robotic exploration machines

5  their robots came and left before we noticed and left no evidence of their visit, and are probably secretly watching us

6  they have a Prime Directive and they won’t visit us until x happens …. and maybe never

Many people confuse the evolution of life with the evolution of intelligent life.  They say life evolves easily and that life is everywhere in our galaxy, but they are not talking about intelligent life, they are talking about bacteria.   The Rare Earth explanation for the Fermi Paradox is not about planets, it’s not about atmospheres, and it’s not about bacteria.  It’s about space faring sentient life.  I could not care less if there are bacteria in every stellar system in this galaxy.  That is boring and has nothing at all to do with the Fermi Paradox.

The evolution of intelligent life is rare, extremely rare.  So rare that the rate per galaxy is well below 1.0 per 13 billion years.  If FTL is possible then the Fermi Paradox requires that the rate of evolution of intelligent life is about once in 13 billion years per universe.  That means we are alone in the entire universe.

Prove me wrong with evidence, not conjecture.  Don’t tell me what “we all know to be true” especially all you atheists, because you won’t accept that argument for the existence of God.

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While subsequent study may have disproven the theory this opens up a new method of proving the existence of aliens.  Even a single atom of element 122 (or higher) would be an artifact proving the existence of alien life…

Or time travel, it’s always possible that in the future human will make the element and then send back in time either coincidentally or as an actual component of the time machine.

Regular readers of my blog know that I propose there are no aliens anywhere and never have been.  So if element 122 is really discovered I claim it’s proof of time travel, not aliens.

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http://enfranchisedmind.com/blog/posts/the-fermi-paradox/

http://www.edge.org/q2006/q06_9.html

http://www.entangledstates.org/2009/06/where-are-they-another-solution-to-fermis-paradox.html

http://www.technologyreview.com/blog/arxiv/23604/

http://www.wunderkabinett.co.uk/damndata/index.php?/archives/1796-Alternative-solutions-to-the-Fermi-paradox.html

http://arxiv.org/abs/astro-ph/0408521v1

Many people still are confused on several points about the Fermi Paradox.  Let’s start with the name.

The word paradox is used because everyone “knows” it’s a “fact” that there are countless intelligent aliens in our galaxy, despite the fact that none of them have made any obvious contact with humans or visits to Earth.  The use of the word “paradox” is sloppy pseudoscience.  We don’t know, in fact pure empiricism suggests we know the opposite.  The complete lack of evidence of aliens in our galaxy is overwhelming evidence that we are alone.  The phrase “Fermi Paradox” has become so ingrained that it is almost a single word, and it will be difficult to eliminate it.  So I’ll keep using it even though I’m convinced there is no paradox.

The reason so many people believe in this “fact” is pure and simple.  Darwinism has blinded us to objective science.  We all “know” Darwinism is true, and we “know” that it’s “easy” for intelligent life to evolve.  Therefore we cannot possibly be alone.  Let’s try to be scientists on this topic.  Regardless of your opinion on Darwinism, the obvious evidence is that we are alone.

There is no evidence of intelligent alien life anywhere within or without our galaxy.  Look around, and specifically look at other galaxies.  We have excellent images of roughly 10,000 galaxies.  Not one of them shows an artificial construction.  Assuming each galaxy is 10 billion years old, that means that not once in 1e14 galaxy-years has an alien race built a galactic superstructure, visible from our galaxy.  Not once.  How can any scientist look at this evidence and claim anything other than “humans are alone” ?

And let’s be clear, the existence of alien bacteria on a rock orbiting Alpha Centauri has nothing to do with this discussion.  I could not care less if every star in this galaxy has primordial life, or even highly evolved tool makers.  This is only about intelligent, sentient, technologically advanced space-faring civilizations.  Bacteria are irrelevant.

Another point of confusion is the difference between “manned” exploration of the galaxy versus robotic exploration.  Frequently bloggers cannot distinguish between these.  They say that there are not enough aliens to staff the exploration ships, therefore the exploration of the galaxy will be a lot slower than “commonly” accepted.  Again they “know” that aliens would probably not send out self-replicating robots to explore the galaxy.

The fact is that even one self-replicating robotic exploration craft would find every solar system in our galaxy in a matter of 100 million years.  That means that for the first few billion years of the existence of the Milky Way no sentient race has built automated exploration craft.  Or does it?

A statistical analysis of the evolution of humans from self-replicating RNA demonstrates that evolution is wrong.  There are too many permutations available which lead to dead ends.  Two billion years on a single planet is not enough time for all the dead ends to be explored.  The current theory of Darwinism requires that life “randomly” chose a viable path 99% of the time, instead of a dead end.  Most mutations don’t work, they result in dead babies, or sterility, or severe biochemical imbalances.  Yet evolution on Earth has mysteriously chosen a viable living mutant baby most of the time.  What an amazing coincidence !

But what if we combine statistics with the Fermi Paradox?  Suppose our galaxy has seen the existence of 1-2 intelligent species that built self-replicating robots.  And instead of hardware, the primary substance of those self-replicating robots is biological?  Suppose that instead of 2 billion years on one planet, evolution has really had 10 billion years on a million planets.  Now the statistics make sense, now we no longer need a miracle of statistics to explain our own biology.

So here’s the resolution of the Fermi “Paradox”.  In the Milky Way (a few million planets over the past few billion years) intelligent life evolved once (or maybe 2-3 times).  That species built self-replicating biological explorers which seeded the galaxy.  We are the result.  Humans are either direct products of alien robotic exploration craft, or we are the first and only intelligent species to evolve in the entire universe.

I prefer the second, I say that the rate of evolution of intelligent life in the Milky Way is about once per 13 billion years.  So prove me wrong, with evidence.  Real evidence.  And don’t waste my time talking about what we “know to be true”.

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