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This was bound to come up eventually: First, notice the quote marks around “Cambrian explosion,” a subtle hint that the term is controversial. It’s not. They state clearly that it is “marked by the appearance of most major animal phyla.” Panarthropoda is a taxon that combines arthropods with tardigrades and onycophorans. The sentence means that yes, lots of different arthropods appear throughout the fossil record, revealing “extreme morphological disparities,” i.e. outward differences. Yet these Chinese specimens show that the brains are conservative — not that they vote Republican, but that CNS structures throughout the panarthropod collection are similar, not showing extensive evolution. They’re not just conservative; they are “remarkably conservative.” In terms of general body plan, it’s a picture of Read More ›

You gotta see the graphic. It’s astonishing: “What’s good for something is tied to its nature … Nature is whatever a thing is supposed to be or become on its own,” Fr. Walshe says. “It’s important to distinguish a natural inclination from a conscious or emotional desire.” Ruth Institute, “How to Tell When Something is Natural or Artificial” at The Stream (April 20, 2022) How do we know the tree did not grow itself that way? Can someone come up with a concise explanation?