Teaching Evolution

A blog devoted to teaching evolution, both in our schools and in our communities.

Thursday, April 21, 2005

Odd Fly Uncovers Evolution Secret

Interesting news about the robber fly of the Canary Islands. Species like the robber fly, which tend to be confined to one area, are more common in places that have a wide variety of different species. Scientists think new species are more likely to evolve if they are surrounded by an already rich biodiversity. The article has a good overview of speciation:
It is thought "speciation" - the evolution of a new species - can occur when two populations of the same species become isolated, allowing them to "grow apart" genetically over the course of many generations.

Eventually, the two populations become so different that if they were to meet again they would no longer be able to breed, meaning they had become separate species.

One species can also evolve into another if strong selective forces are placed upon it (where certain genes or genetic traits are favoured by natural selection), or if its population is small enough to allow for "genetic drift", which happens when certain traits are lost - or become proportionately more common - simply because the gene pool has shrunk.

But exactly what drives speciation is still not fully understood by scientists, and it is an area of intense research.

Finally, take a look at the last four paragraphs:
Professor Axel Meyer, of Konstanz University in Germany, who is eminent in the field of speciation, says the research is very interesting - if it stands further scrutiny.

"It is very thought provoking," he told the BBC News website. "I'm sure it will have people rushing to their computers to see whether this pattern holds up and it will be interesting to see if it does hold up in other systems."

He also stressed that a rich biodiversity could not entirely explain a rich biodiversity because, of course, you had to start somewhere.

"They are saying that if you have biodiversity it will create more biodiversity - I can buy that. But it still doesn't explain the initial step: how do you get more biodiversity in the first place?"


Here is a fundamental difference between the scientists who study evolution and the proponents of creationism or intelligent design or whatever they want to call it. When scientists discuss evolution, they welcome questions. They don't just accept what they're told; they point to the next question that the new findings raise. Intelligent designers avoid questions; scientists seek them.

1 Comments:

At 12:38 PM, Blogger mynym said...

"They don't just accept what they're told; they point to the next question that the new findings raise. Intelligent designers avoid questions; scientists seek them."

Then you are "avoiding questions" by writing a text made up of symbols and signs there that supposedly represent "your" design.

Sheesh...there is a misanthropic tendency among a segment of scientists who maintain Naturalism. That which you apparently adhere to as well.

The evidence of evolution itself is that natural processes are an unfolding of transphysical information into physical formation and not vice versa. That is an issue worthy of a book of text. No one should expect anyone to take these matters on in one paragraph or one blog comment.

Here is something to think about; some of why your text may have "meaning":
(The Quantum Brain
By Jeffrey Satinover)


If you are a thorough going Darwinist, then perhaps you would argue that utlimately Nature "selected" your text. But then one wonders why you would expect another "mind"/brain to read it as if it applies to them. For they would be made up of nothing more than their own natural selections and natural happenstances, naturally enough.

 

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