The Cambrian Explosion, demonstrated time and again to be an ‘explosion,’ is a problem for Darwinian theory. Darwin postulated gradualsim; in fact, he insisted upon it when pressed by supporters to modulate this position of his.
The problem is that multiple life forms are required to “build” new life forms. You need lots of species for higher taxa to accumulate over time. But we see almost the complete opposite in the Cambrian Explosion. Steven Meyer wrote a book about this: Darwin’s Dilemna.
Now there’s more. Another ‘explosion’ during the Ordivician. The authors of a study published in Paleogeography, Paleoclimatology, Paleoecology had this to say:
The early evolution of animal life on Earth is a complex and fascinating subject. The Cambrian Explosion (between about 540 to 510 million years ago) produced a stunning array of body plans, but very few separate species of each, notes Stigall. But nearly 40 million years later, during the Ordovician Period, this situation changed, with a rapid radiation of species and genera during the Great Ordovician Biodiversification Event.
The triggers of the GOBE and processes that promoted diversification have been subject to much debate, but most geoscientists haven’t fully considered how changes like global cooling or increased oxygenation would foster increased diversification.
A recent review paper by Stigall and an international team of collaborators attempts to provide clarity on these issues. . . .
In their paper, Stigall and colleagues demonstrate that the main pulse of diversification during the GOBE is temporally restricted and occurred in the Middle Ordovician Darriwilian Stage (about 465 million years ago). Many changes to the physical earth system, including oceanic cooling, increased nutrient availability, and increased atmospheric oxygen accumulate in the interval leading up to the Darriwilian.
“Main pulse” of diversification? Yes, around 10 million years. Just like the Cambrian Explosion. Shall we call this “pulse” the Ordivician Explosion—to go along with the Mammalian Explosion and the Bird Explosion, etc.
The authors give away the store: the Cambrian Explosion produced a whole host of “body plans,” but few “species”—the COMPLETE OPPOSITE of Darwinian expectations, and, then, 80 million years later a whole host of species ‘explode’ onto the scene. No ‘gradualsim’; just a huge amount of diversification out of nowhere in an incredibly short amount of time. So, in the Cambrian: body plans, but not a lot of species. In the Ordivician: a lot of species, but no new body plans.
To an intellectually honest person, these facts should cause serious concerns about the scientific validity of Darwinian theory, to the point of abandonement. Most who have thoroughly studied the foundations of Darwinian theory and compared it to actual facts end up untethering themselves from this sinking ship.
Robert F. Shedinger is the latest to take this voyage.