Oct 24
Two thoughts on Darwinian Evolution
Posted by SamH in Uncategorized on 10 24th, 2009| | No Comments »

It’s not just survival of the fittest

What is the other major part of evolution ? If you agree with evolution, and who doesn’t, if you laugh and scoff at people who don’t, surely you know what the other major factor driving evolutionary development is.

I suspect many people don’t, because it doesn’t get much play. For some reason, maybe because it’s not sexy.

That was a clue, you all have it now ? It’s sexual selection, mating.

Obviously if your mutation gives you a 0.1% better chance of surviving but because the mutation is, for whatever random reason, repugnant to the other sex of your species you have a 0.2% less chance of successfully mating and having offspring you’re not on to a winner.

It’s more interesting in the reverse, what if the mutation reduces your chance of surviving but increases your chance of successfully mating. I have read many cited examples of this, massive antlers that require support, extra nutrition and actually make it harder to fight. But the chicks dig them.

I really enjoyed this book on the topic, not to say everything in it is correct, merely that is provides some welcome coverage of the other aspects of evolution besides SOF
The Mating Mind by Geoffrey Miller

Wings, Are you really so Confident it’s a done deal ?

I believe in the the theory of evolution. I would not be suprised if in 50 years the theory looks quite different from the way it is today.

There seems to be a bit of a vibe out on the interwebs that evolution is as Darwin laid it down, it’s a complete theory, done and dusted, and people who question it are quacks.

Not everyone has this attitude obviously, but enough to be irritating.

From what I’ve read in Scientific American (I’m not claiming to be an expert, but I do read magazines in the crapper :) ), interspecies gene transfer has become a recent hot topic since new evidence has arrived showing that the ‘tree of life’ ain’t really much of a tree.

But what about a much simpler example of uncertainty in the understanding of evolution.

Let’s assume for the a moment you are a strong advocate of evolution, when someone says it’s a incomplete theory you laugh, when someone suggests that maybe it’s not correct at all you give a wry smile, those fools.

Let me ask you a question, how did wings evolve ?

Now I won’t hold you to the scientific standard of proof, I don’t need a correct explanation, I just need a plausible one.

You see most people don’t think evolution involves massively complex mutations appearing, people don’t believe an eye or a heart or a leg simply appeared in an offspring in a single generation. My impression is that people believe complex systems evolve over time, small mutations building upon previous mutations that were found to be beneficial to the host, and hence survived and spread.

Well the problem is that 1/2 or 10% of a wing is does not give you 1/2 or 10% of the value of a wing. Until some certain threshold is reached the wing doesn’t enable you to fly or glide, it’s just something you need to drag along behind you in order to make sure the predators can hear you coming.

Ah you say, well maybe wings evolved slowly over generations but they provided some other survival or mating benefit! Maybe they were heat disipators! maybe they were something else.

Well my point isn’t that wings didn’t evolve, my point is that the question of how they evolved is not clearly understood or agreed upon. Google it, there are many competing theories as to how wings evolved.

Now if you are aware of all this and more, and find my writing simplistic fair enough, you may be justified dismissing me and anyone else who says evolution is not a done deal, if however any of this was in anyway new you should stop being so dogmatic about evolution for the win.

Oct 2
Some Books
Posted by SamH in Books on 10 2nd, 2009| | 1 Comment »

Here are some of the noteworthy books I own, mouse over the books to get the skinny.
(If you need to scroll up and down once there is a popup it may be easiest to use the mouse wheel.)

maugham feynman clapton MindsI GEB SICP dragon C dynamichtml CodeComplete datawarehouse ramsay branson Image Map
If you have a book you would like to recommend please let me know in the comments.
Maybe someone should make a site where people can upload bookshelf pictures and then create image maps and add descriptions. Maybe such a site already exists. Maybe Amazon is a more useful home for people’s book reviews. just an idea.