The Cambrian Explosion Argument

This is a new one to me. I thought you guys would like to know about it.

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[chandler22]

thanks for the video. this subject was one that gave Darwin himself cause to doubt his general theory...

[Larian1975]

@chandler22 Did he doubt it? I know that he was aware that the Cambrian fossils could be a problem, but basically said "time will tell." To my understanding, he had a good deal of confidence in his theory for evolution.

[Larian1975]

@celal777 That definition is not accurate. Evolution of a species can (and does) occur by both human intervention and natural selection pressures. In the case of the wolves -> dogs example, I was attempting to illustrate how incredibly diverse a given species' genome can become. In the case of dogs, humans were the selection pressure. In the case of trilobites, natural forces such as predation and climate change caused the differentiation of the species into a multitude of others.

[Larian1975]

@celal777 It seems like you might not have the latest evidence on hand. Evolution is actually an observed phenomenon. Not only does the fossil record bear it out, but we've watched it happen in the laboratory.

[celal777]

@Larian1975 i don't want the best answer you can give me i want a scientific answer if what we are talking about is science. problem is evolution is just a lot of "just so" stories not science.

[celal777]

@Larian1975 dog or horse breeding is guided by humans --- you can't use that argument for evolution which by definition is and even must be unguided.

[Larian1975]

@celal777 In the precambrian, things didn't really change very much as far as outward appearances go. And it was like that for a *really* long time. Plenty of time for those invisible mutations to happen. Modern day dogs are a good example of this on short timescales with artificial selection. In just 10,000 years we have taken wolves and bred everything from teacup chihuahuas to Irish wolfhounds and pugs. All I'm suggesting is that nature did the same thing with Cambrian biota.

[Larian1975]

@celal777 I'm sorry for getting to you so late. It's a good question and I'll give you the best answer I can.

A climate shift or predation would place selection pressure on existing organisms. If enough non-harmful mutations had occurred and built up in the DNA, a response to this pressure would begin manifesting itself because it finally had a reason to instead of being reabsorbed into the gene pool.

[celal777]

"biodiversity increased by orders of magnitude" -- why ? climate shift, "predation" : explain to me how these things increase biodiversity by "orders of magnitude" ? seems to me these things would wipe out living things by "orders of magnitude".

[tinroad66]

Cambrian...

No mammals

No reptiles

No amphibians

No dinos

No insects

No land plants

The Cambrian refutes the creationist history of life and is consistent with the modern scientific, evolutionary, history of life.