Friday, February 27, 2009
Porn in the USA: Conservatives are biggest consumers
Saturday, January 24, 2009
Sophophora melanogaster hits Nature's news wire
"Quantum fluctuation" verus "God"
The issue at hand is: "Where did it all start?" The devout christian will say: GOD! The devout atheist will say: QUANTUM FLUCTUATION! Ray launched a new website called: "Pull the plug on atheism", PZ of course responded like stung by a bee with: "The banana man thinks he's got atheists on the run" after which Ray fired back with: "A Challenge to a Professor" followed by PZ response: "Called out by a clown" with of course a response from Ray: "Professor Myers Flakes"...... Somewhere on the line, PZ indicates that Ray's answers have been answered in the comments, and sure enough, many provided little pieces to that answer. Most interesting is a comment by "cosmologist" here:
Ray, the universe began from a quantum fluctuation (big bang); a phase transition from potential energy to kinetic energy.
Quantum fluctuations were the FIRST CAUSE and PRIME MOVER of the universe. The universe before the big bang was in a quantum state. There's no need to resort to asking what came before quantum fluctuations because CAUSALITY breaks down at the subatomic level (the condition the universe was in the beginning).
Because the universe was in a quantum state before the big bang, it adheres to the quantum uncertainty principle. There can be NO SUCH THING AS NOTHING in this universe as long as the generation of energy via virtualparticle pairs does not violate the law of energy conservation; it requires no miracle or supernatural act to create the energy in the universe.
Ah, it contains the convenient escape hatch:
There's no need to resort to asking what came before quantum fluctuations because CAUSALITY breaks down at the subatomic level
Cosmology (religious or scientific) has a fundamental problem, and that is to explain the beginning in a way that does not require a ultimate cause. So, the break down of causality is convenient, and even if true, it does not rescue the problem, because:
Because the universe was in a quantum state before the big bang
So, before we had the big bang, there was a universe in a quantum state that already existed:
Because there can be no such thing as 0 energy in the universe, the universe also adheres to the thermal laws of thermodynamics, which basically says absolute zero is unattainable. This shows that there cant be or never was NOTHING in this universe.
So, there was always something. And where did that something come from? No answer.
I understand that people at that point invoke gods, but heck, as PZ correctly asked:
who made god?
I think this is an eternal stand-off, because neither can answer the others question, and it is here where neither knows.
And I, I don't know where it all started, but I do know that both are wrong with their limited and narrow-minded world views...... But that is for another time......
Wednesday, November 26, 2008
Sophophora melanogaster (part 2)
Doing nothing basically leads to the conservation of the current situation, in which taxonomists can split of smaller groups if they wish. There are several good candidates to be split of, and for which it is relative easy to just examine all species and find characteristics that are unique for the new genus. Unfortunately, that is effectively just increasing the paraphyly issue in the genus Drosophila. Two people objecting to doing the split now claim that we first have to examine ALL type species of the genus and the included genera, what effectively means examining 2250+ species, especially knowing that there are at maybe as many as 1500 undescribed species in the family, many of thoise within the genus Drosophila or the embedded genera (Oriental region and Hawaii primarily). Requiring that will result in a defacto arrast of any progress with regard of thie paraphyly issue.
Lumping the genera to a single genus is maybe even worse. Besides the enormous size of the genus (~2250 describe plus undescribed -> 3000+ species), it woyuld be very heterogeneous, and that is exaclt what we don't want; it is why various genera like Hirtodrosophila and Scaptodrosophila have been removed from te genus. But worse, there will be over 100 secondary homonyms, aka, species with the same scientific species name. In all these cases, a new name has to be generated, and if someone in the future removes those species again from the genus, the renaming has to be undone because the older name has priority. So, in stead of actually dealing with the issue at hand, it is just creating a much bigger issue.
So, splitting seems the only sensible thing to do. several clades are well defined, generally recovered as well-supported monophyletic clades. Some claim that for example the saltans-willistoni clade is basal to all the other drosophilids (aka, that this clade is the first to branch off, see MP-situation). This would mean that the second main branch in the subgenus Sophophora, the obscura-melanogaster clade together with all the other subgenera and the included genera is the sisterclade of the saltans-willistoni clade.
Well, there is a substantial amount of evidence against that topology. First of all, all studies claiming such an effect are based on Maximum Parsimony (MP), notorious for many things, but in this case primarily because it is often inadequate for issues related to variation in nucleotide composition. Variation in bucleotide composition can be adequatly addressed in Maximum Likelihood and Bayesian analyses using an adequate nucleotide substitution model that can explain apparant deviations. When you do that, the result is as in the figure under "Actual situation".But there is another reason to suspect that the figure under "Actual situation" is better, and that is that the 12 genome paper actually has species of all three branches, and that study using about 9000 genes (gasp) clearly demonstrated that the "Actual situation" figure is correct, and the MP situation is incorrect. A similar situation occurs with the virilis s.l. and repleta s.l. clades in the virilis-repleta radiation. Here again, the 12 genome project tree clearly confirms that both branches are within a single monophyletic clade, and not in a different topology as suggested by some.
So, what will happen in the future? That is inclear. We have first to wait till the commission decides about the Sophophora melanogaster problem, and if they decide to go ahead, we will submit an article proposing to split the genus. If the commission decides against us, it might take a different route, with proposals to split of various clades till be effectively have a very extreme genus Drosophila with the melanogaster-obscura group and part of the immigrans-tripunctata radiation that contains the type species, D. funebris.
I keep you all posted!
Monday, November 17, 2008
Sophophora melanogaster

Not everybody likes that, and some have decided to organise a one day workshop to address this issue and some additional issues.
A major issue with splitting the genus is that one most used model organism, Drosophila melanogaster will change its name to Sophophora melanogaster. Yes, indeed. Impossible! That is not even worth a discussion, the sheer magnitude of schoolbooks, internet pages, etc that need to be adapted to accommodate such a change is unacceptable. Fortunately, there is a small group of scientists at the International Commission on Zoological Nomenclature who can debate, vote and overrule the normal rules for naming species. So, we submitted an application (pdf) to them, in which we asked them to fix this for the community by setting asside the current type species (D. funebris), and make D. melanogaster the new type species. Problem solved. You would think. Sounds like a no-brainer to me.
Unfortunately, a bunch of people object to it. Some say that the world just has to print new books, change the texts etc, and that we do not have to be mindfull of all those schoolkids etc. Others say we do not know enough, which as fas as I am concerned is bogus, but heck, disagreement is the fuel for progress.
Anyway, in a few days, I will be defending our proposal to split the genus, and see whether we can actually agree on this. I keep you posted!
Sunday, November 16, 2008
Boycott Michael's Arts and Crafts store
Anyway, there are several initiatives going on, but till that time, please, boycott Michael's in Tallahassee.