Evidence Contrary to Evolution - The Cambrian Explosion
Well, I thought that it would be a decent idea to overview some of the strongest evidences against evolution.
Why? Is it because I'm an irrational crusader for the ignorant Christian Right? Well, I do lean right and I am a Christian but I am not irrational and really did start with an open mind before I began to gain knowledge of this subject and found the evidence to be compelling enough to confidently proclaim Neo-Darwinian evolution to be falsified.
This would be a good time, in light of the previous post on logical fallacies, to point out that my Christian beliefs are irrelevant to the truthfulness or veracity of my anti-evolutionary claims. If you disagree, you are committing the genetic fallacy. :)
OK, first up is the Cambrian Explosion (note the disclaimer about errors in this article). The Cambrian explosion refers to a period of time about 540 million years ago. Before this explosion (pre-cambrian) there were only single-celled organisms and non-differentiated multi-celled organisms (say sponges). Then, over a period of less than 5 million years something like 69 of 71 phyla ever to exist on Earth 'suddenly' appeared. Some things to note about that statement:
- You will often see that period of time listed as 10+ million years, but the latest scholarship seems to be saying it's down perhaps to as short a time as 1 million years. I say 5 to be safe. The best 'resolution' for the dating comes from recent study of a fossil bed in Hunan province in China. References to the Burgess Shale site in Canada is old data.
- 'Suddenly' means in geological or evolutionary terms.
- Sometimes you will see the number of discovered phyla being listed as around 20. I think the difference is whether you count sub-phyla in the number.
This raises two problems for evolutionary theory. The first one is the length of time for the introduction of all of these new life forms. First, evolution can only move at a certain pace. Many evolutionists will say that the speed of evolution will accelerate and decelerate depending on environmental factors. While this is plausible, it's not supportable by evidence. Firstly, they usually mean that periods of greater stress drive faster evolutionary speeds. While this might be intuitively sound, the fact is that environmental stressors that increase the rate of mutation always result in widespread extinctions (this is borne out by the fossil evidence, and laboratory testing). If they are referring to an increased rate of natural selection, then it still doesn't answer the issue of the speed of mutations which is the 'engine' that drives the car. Mutations just are not interjected in a rate fast enough to drive the evolutionary explosion we see in the Cambrian.
For this reason, many scientists have historically claimed that evolution had been happening for hundreds of millions of years prior to the Cambrian explosion and that the 'explosion' is only an explosion in fossilization rates due to the right circumstances for fossilization, combined with the fact that earlier life forms were smaller, softer organisms that just aren't prone to fossilization.
This line of reasoning has been ruled out by the fact that we have an unbroken chain of fossilization throughout history prior to the Cambrian and we are adept at identifying single-celled fossils. In addition, any possible hope of this is precluded by the global snowball event that immediately preceeded the Cambrian. This snowball event covered the Earth's oceans with a layer of ice about 1 kilometer thick all the way down to the equator for a period of about 10 million years. The event was so catastrophic that none of the multi-cellular creatures seen in the Cambrian could have any multi-celled ancestors. As it stands now, after years of resistance to the snowball theory by evolutionary biologists, it has finally been accepted and is even now being called the catalyst for the Cambrian explosion!
Darwinian theory would predict that life would progress much more slowly than we see in the fossil record. It would predict that life's progression would not only be slow, but fairly methodical (ie. consistently happening too slow to see all around, much like the way a tree grows). This 'prediction' of evolution has failed.
Another prediction of evolutionary theory is that life's complexity would proceed in stepwise fashion. We should see the introduction of one species which eventually gives rise to a second related species, then a third until you eventually get a species that barely crosses the line and becomes the first member of a second genus. This would continue until you have a second family, then a second order, then a second class, and then a second phylum.
When this is depicted in a top-down manner (phyla containing classes containing orders...on down to species) you get this:
The problem is with what's been termed the Inverted Cone of Disparity. This refers to the observation that the fossil record, beginning with the Cambrian explosion, shows the vast spread of distinct phyla that then diversified in to various species rather than the other way around.
Darwinian evolution holds that all new species are descended from a similar ancestor. It is then absolutely inexplicable why so many phyla appeared in the Cambrian (practically every one ever to have existed in the history of the Earth!) and then for species to have diversified within those phyla. Over the course of the history of the Earth, scientists tell us that only one or two new phyla have been introduced outside that period of time less than 5 million years during the 'explosion'.
I cannot find the quote, but I have heard that Stephen J. Gould has called this the greatest mystery known to evolutionary biology. If anyone is able to confirm that quote, please throw a comment in here.
In my opinion, the Cambrian explosion falsifies Neo-Darwinian gradualism. None of the alternative explanations I've ever heard offered for this have any merit.
Note: in searching the web for "Inverted Cone of Disparity" I can only find references that originate with me (well, one other). I did not coin the term and have no idea why it's not all over the web. If anyone knows where the term comes from, or knows an alternative term for the phenomenon, please comment that in here too.



