What degree of credibility do you attribute to a journal (International Journal of Astrobiology) publishing and highlighting Stuart Pivar’s “The origin of the vertebrate skeleton“.

The lowest possible. Congratulations to Simon Mitton (Managing Editor, astronomer [physics and astrophysics]), Rocco Mancinelli [biologist] and Frances Westall [biologist] (Associate Editors).
And PZ Myers on the subject
My favorite is figure 6

Now, maybe Vincent Fleury have something to say to the editors of this journal. The vortices aren’t apparent there

