tag:blogger.com,1999:blog-6679492.post116106166554577544..comments2023-11-18T16:30:36.930+02:00Comments on public weblog('jaysen naidoo'): natural selection of universes !jaysenhttp://www.blogger.com/profile/01546489147387689812noreply@blogger.comBlogger11125tag:blogger.com,1999:blog-6679492.post-25938725989681901592007-10-27T12:27:00.000+02:002007-10-27T12:27:00.000+02:00thanks fan-fan. Still havent got my hands on Life ...thanks fan-fan. Still havent got my hands on Life Of The Cosmos - might have to wait till i leave Algeria in 8 months, for lands better served by amazonjaysenhttps://www.blogger.com/profile/01546489147387689812noreply@blogger.comtag:blogger.com,1999:blog-6679492.post-511402959119608062007-10-25T22:11:00.000+02:002007-10-25T22:11:00.000+02:00some more... http://video.stumbleupon.com/#p=anzob...some more... http://video.stumbleupon.com/#p=anzobm3cpsFan Fan Hulmaidahttps://www.blogger.com/profile/00585474511694484796noreply@blogger.comtag:blogger.com,1999:blog-6679492.post-40049745466612367802007-05-18T20:02:00.000+02:002007-05-18T20:02:00.000+02:00Here is something relevant:http://space.newscienti...Here is something relevant:<BR/><BR/>http://space.newscientist.com/article/mg19426034.200-is-the-evidence-for-alien-universes-all-around-us.htmlFan Fan Hulmaidahttps://www.blogger.com/profile/00585474511694484796noreply@blogger.comtag:blogger.com,1999:blog-6679492.post-43867660324852870332007-04-23T21:26:00.000+02:002007-04-23T21:26:00.000+02:00fair enough - will have to find and read 'The Life...fair enough - will have to find and read 'The Life of the Cosmos'jaysenhttps://www.blogger.com/profile/01546489147387689812noreply@blogger.comtag:blogger.com,1999:blog-6679492.post-26903932439579577762007-04-23T21:12:00.000+02:002007-04-23T21:12:00.000+02:00If there are a range of independent constants whic...If there are a range of independent constants which affect the number and distribution of black holes (and that is a big 'if') then CNS predicts that they would tend to be at local maxima for black hole production. If any particular one were found to be far from this value, falsification of CNS might be avoided by invoking random drift. However, this strategy is not going to work for the whole set of constants. If the values of these constants are randomly distributed, with no clear trend towards black hole fecundity, then this form of CNS is falsified. Smolin spells it out quite well in his book 'The Life of the Cosmos'.<BR/><BR/>As for the causal distinctness issue, this may just be semantic. The standard account of 'universe' is 'all that there is'. A remodeling in light of Smolin's, Vilenkin's, Tegmark's, or Everett's physics treats 'universe' as 'distinct causal space-time domain', with the suggestion being that if two domains can interact causally, they must be part of the same universe. I guess my ideas about causality find no purchase when we talk about events in one space and time causing events in another space and time - I am no longer clear on the modus operandi.<BR/><BR/>Whether a black hole can interact with its parent might depend on whether the information lost to a black hole is retrievable in the long term.<BR/><BR/>Anyway, the best part of Smolin's work is charting the organic, almost biological nature of the evolution of galaxies.Fan Fan Hulmaidahttps://www.blogger.com/profile/00585474511694484796noreply@blogger.comtag:blogger.com,1999:blog-6679492.post-50776115063446123162007-04-18T18:43:00.000+02:002007-04-18T18:43:00.000+02:00fan-fan: I like smolin's idea for those reasons to...fan-fan: I like smolin's idea for those reasons too. Its just the claim of falsifiability that i'm having trouble with, because i think that any discovered higher local maximum could be explained as signs of random drifting mutation along the beach of such islands of evolutionary stability. Therefore, such a discovery would not necessarily prove the theory false - even, i think, by the standards of probabilistic falsifiability.<BR/><BR/>as for the 'mating universes', i was being slightly cheeky, but is a universe spawned by a black hole also 'forever causally distinct' from the universe that contains the blackhole?jaysenhttps://www.blogger.com/profile/01546489147387689812noreply@blogger.comtag:blogger.com,1999:blog-6679492.post-59868517759533773522007-04-18T03:00:00.000+02:002007-04-18T03:00:00.000+02:00Consider the set of possible organisms (or univers...Consider the set of possible organisms (or universes) that could evolve as distributed over a landscape, with simpler structures being lower down and more complex being higher up. The more unlikely, complex and organised structures are at peaks in the landscape. Dawkins is all about showing that every improbably sheer cliff is reachable by small, gradualistic, Darwinian changes in design. Attaining higher peaks tends to require some downhill walking towards more simplicity, at least initially. We would expect complex evolved items (like us and our universe) to be at local maximums (of reproductive fitness), islands of evolutionary stability, occasionally nudged towards greater heights of complexity by environmental change and variation. <BR/><BR/>Smolin's CNS seems attractive because the causal antecedent of the whole multiverse ensemble (i.e. the first big-bang big enough to produce a new black hole), need not possesses the unexplained complexity, structure and order of our current universe. This can arise naturally via CNS. <BR/><BR/>Perhaps this makes the original 'quantum fluctuation in the void' (that got the whole ensemble going) simple enough not to cry out for explanation like fine-tuned organisms and universes do, in which case the 'Argument from Design' is undone. If only CNS also resolved the cosmological question - 'why is there something rather than nothing?' <BR/><BR/>If these black-hole/big-bang domains are not forever causally distinct (as your faintly troubling 'mating universe' scenario implies), calling them 'universes' seems especially gratuitous. Anyone got a catchy name for our 'local space-time domain'? It will soon be relegated, just like Pluto...Fan Fan Hulmaidahttps://www.blogger.com/profile/00585474511694484796noreply@blogger.comtag:blogger.com,1999:blog-6679492.post-72941181234819384842006-11-05T21:33:00.000+02:002006-11-05T21:33:00.000+02:00a-man - as universes necessarily dont share the sa...a-man - as universes necessarily dont share the same space-time, dating becomes too difficult for sexual reproduction.<br /><br />although, maybe the brane-collision hypothesis, which involves the collisions of two seperate spacetime membranes, is sort of sexual.jaysenhttps://www.blogger.com/profile/01546489147387689812noreply@blogger.comtag:blogger.com,1999:blog-6679492.post-8320245634180626502006-11-05T19:41:00.000+02:002006-11-05T19:41:00.000+02:00Which leads us to ask how do they reproduce, and m...Which leads us to ask how do they reproduce, and more importantly, does the galaxy have a gender, or is it asexual? Does it evolve by means of mating? How would it find a suitable partner? <br /><br />Lends a whole new meaning to the Big Bang ;)Anonymoushttps://www.blogger.com/profile/14021970805253420033noreply@blogger.comtag:blogger.com,1999:blog-6679492.post-1161876254233802072006-10-26T17:24:00.000+02:002006-10-26T17:24:00.000+02:00This comment has been removed by a blog administrator.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6679492.post-1161100157173231022006-10-17T17:49:00.000+02:002006-10-17T17:49:00.000+02:00cool blog jaysen. i just read it again nowDScool blog jaysen. i just read it again now<BR/><BR/>DSAnonymousnoreply@blogger.com