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.
I have been writing a series of articles on alleged Ediacaran animals that have been postulated as precursors of the Cambrian explosion.
The five authors, led by Thomas Y. Lo, cover the range of evidence for intelligent design in under 150 pages.
Dr. Tyson’s imagination wanders from Enceladus, a moon of Saturn, to the Cambrian explosion.
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.