The notion that many genes would be required for the Cambrian explosion may seem unsurprising — what is surprising is that anyone would challenge the idea.
The most celebrated Precambrian sponge may not be a sponge at all. Watch Darwinians try to coax it into spongehood.
The claim that a spike in carbon isotope concentrations led to the explosion of biological diversity in the Cambrian doesn’t hold up, as if it would have helped, anyway.
In the words of Robert Rosen we have to “drastically reconsider what is meant by “genetic information.’”
Ikaria wariootia is just another problematic Ediacaran fossil that could be anything from inorganic artifact to protozoan to cnidarian and yes, maybe a bilaterian worm.