Talk:Late Heavy Bombardment
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[edit] Re-adding of the critisims section
I notice this section has been re-added. I had originally removed this because the later data suggests that the "single impact" theory does not hold water. Given that some of these meteors are assumed to have come from the dark side, the "lower bound" at the same figure is extremely strong evidence that the Apollo rocks are genuine and not derived from Imbrium. The same argument is strong evidence against the second claim as well. Further progress in geochronology has pretty much ruled it out anyway, something that is covered (in passing) in one of the other refs I posted. I'm all for leaving these comments in, but the way the are presented leaves much to be desired. I believe the "back and forth" of history presents a valuable insight into thr workings of real-world science, and that separating the arguments breaks this chronology. For instance, the single impact concern now appears later than the evidence that is used to counter it. To the reader this suggests that the evidence in question does not have an answer (an astute reader might notice this, but that's not the point), and further it seems confusing because that line of argument predates the meteor information. I'm also a little worried about the wording of this section, because it seems to suggest something is "amiss" in the fact that the meteors date to a spread of times, but this is precisely what one would expect, it's the "lower bound" that is so interesting, for exactly the same reason that the "lower bound" is so interesting here on Earth. Maury 12:47, 7 March 2007 (UTC)
- Many respectable scientists do not believe the cataclysm hypothesis, and that is why I added an up to date reference by Bill Hartmann (he is one of the founders of the "crater chronology" method). I thought that the way it was written in the previous version misleadingly would lead someone to believe that the scientific community now believes that the case is nearly closed, which, as a lunar scientist myself, I can say it is not. Recently, even some of the dynamicists are beginning to question whether the data actually require a cataclysm. Perhaps we could have a "history of the cataclysm hypothesis" section, but I think that such a controversial topic also needs an "evidence for" and "against" section as well. When I get some more time, I will add more references. I am somewhat busy in real life right now preparing for the upcoming lunar and planetary science conference. Lunokhod 13:33, 7 March 2007 (UTC)
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- Well I'm sure that "respectable scientists do not believe", but that's a hopeful sign. My concern is really about the presentation. Perhaps we could return to the historical overview layout, and then add another section called "ongoing debate" or something similar? Maury 16:57, 7 March 2007 (UTC)
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- This is not meant as a challenge, Lunokhod, merely a request for information: can you give a pointer in the technical literature to doubts among the dynamicists? I recently heard a talk by one pushing the cataclysm idea. BSVulturis 22:19, 19 October 2007 (UTC)
[edit] Mya
Does "Mya" stand for "million years ago"? If so, we should explain that somewhere, and remove the "a" in contexts where the "ago" is not appropriate. If not, what does it stand for? --P3d0 18:00, 9 July 2007 (UTC)
- Point taken, fixing... Maury 20:52, 9 July 2007 (UTC)
