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Mr Gary



Joined: 30 Apr 2009
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PostPosted: Wed Dec 16, 2009 4:25 am    Post subject: Reply with quote

I've often been thanked for ingesting my own balls, but you're welcome anyway.
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Usagi Miyamoto



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PostPosted: Fri Dec 18, 2009 9:59 am    Post subject: gives stab stab stab a whole new meaning Reply with quote

Bug powder causes male bedbugs to stab each other to death with their penises

En garde!
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Jinx



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PostPosted: Fri Dec 18, 2009 4:39 pm    Post subject: Reply with quote

Homosexual stabbing rape, at its finest!
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LD!



Joined: 11 Nov 2006
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PostPosted: Fri Dec 18, 2009 11:27 pm    Post subject: Reply with quote

Do you mean that because they're gay or because there is only one sex involved?
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Usagi Miyamoto



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PostPosted: Sat Dec 19, 2009 7:34 am    Post subject: Reply with quote

Quote:
Let's not forget Homosexual Stabbing Rape. In fact, let us NEVER forget Homosexual Stabbing Rape, no matter how much we may try to forget Homosexual Stabbing Rape.

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WheelsOfConfusion



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PostPosted: Sat Dec 26, 2009 7:08 pm    Post subject: Reply with quote

V'ger probes still unlocking secrets of the Universe.
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mouse



Joined: 10 Jul 2006
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PostPosted: Wed Dec 30, 2009 3:05 am    Post subject: Reply with quote

the voyagers make me happy on many levels, not least because they keep finding new stuff.
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WheelsOfConfusion



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PostPosted: Wed Dec 30, 2009 4:44 am    Post subject: Reply with quote

Confirmed: Ginkgo biloba does zilch for your brain.
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WheelsOfConfusion



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PostPosted: Mon Jan 04, 2010 6:19 pm    Post subject: Reply with quote

Mad Cow Disease can evolve, without any DNA or RNA.
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picturesofsky



Joined: 13 May 2008
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PostPosted: Mon Jan 04, 2010 7:58 pm    Post subject: Reply with quote

WheelsOfConfusion wrote:
V'ger probes still unlocking secrets of the Universe.


I read that whole article.
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mouse



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PostPosted: Mon Jan 04, 2010 8:50 pm    Post subject: Reply with quote

WheelsOfConfusion wrote:
Mad Cow Disease can evolve, without any DNA or RNA.


is that really evolution, though, or just strong selection? it looks like there aren't new variants created, just the best variants (given the presence of the drug) come to dominate the 'population'.

maybe it's my definition of evolution - i consider true evolution involves a continually changing gene pool, not just pressures that select from that gene pool. you need both of them, to see a true change.
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The Highlord



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PostPosted: Tue Jan 05, 2010 5:52 am    Post subject: Reply with quote

Well, that's exactly what makes this study such an attention-grabber, mouse. You mention that evolution involves a gene pool: this is an article about how that isn't necessary. Novel mutations do pop up in the prions, and selection pressure changing the modality of a population is very much evolution, even if no mutations leading to new traits are involved.
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mouse



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PostPosted: Tue Jan 05, 2010 11:07 pm    Post subject: Reply with quote

if there are mutations in prions, then that fits with my definition of evolution. i understand that prions don't have genes, but they do have a specific order of amino acids that can be duplicated and reproduced. if you have a fixed number of specific patterns in a population, and you alter the percentage of those patterns, this, to my mind, is not evolution. it is a necessary _step_ in evolution (selection of advantageous forms) but it's not the whole thing. you don't actually get anything new, you get a change in the population proportions until (presumably) one form swamps out all the others - and then it stops.

but if you are getting changes in the forms in the population; i.e., new forms coming into existence which can then be acted on by selection - then, you're talking evolution.

to my mind.
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WheelsOfConfusion



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PostPosted: Wed Jan 06, 2010 2:06 am    Post subject: Reply with quote

That's a good point, if new topologies aren't really generated but just an existing set of them shuffled into predominance under certain conditions, there's not really anything new coming out of it.
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The Highlord



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PostPosted: Wed Jan 06, 2010 11:50 am    Post subject: Reply with quote

To which I'll cite Darwin's finches. New mutations aren't required for the beak sizes to shift: the variation in beak size is already present, and selection pressure shifts the modality of the population towards larger or smaller beaks. A bird suddenly evolving a corkscrew beak isn't necessary for it to be evolution in action.

Evolution is much more than just changes leading to speciation, of which mutations are a very important impetus. Just stirring the pot can lead to incredible diversity without new mutations being required due to redundancy and level of expressiveness of genes: except in the case of prions, it's due to protein-protein interactions.

I also find any discussion of information when it comes to lifeforms incredibly muddled and tangential. It's an abstraction that everybody has their own definition of.
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