Over on the thread for the scientifically illiterate - James wrote this humdinger today


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This kind of comment


is what happens when the two lonely marbles rattling around in James’s head try to impersonate a brain—when I say he hasn’t read a single serious book on the subject, I’m not being dramatic, just accurate.
Actually, the distinction between micro and macroevolution isn't just a theistic invention—it’s acknowledged in evolutionary biology itself. Microevolution refers to small, observable variations within a species—like changes in beak size or coloration—which occur through mutation and environmental pressures. These are well-documented and repeatable.
Macroevolution, however, involves the emergence of entirely new body plans, organs, or functions—such as a land mammal evolving into a whale—which requires far more than just stacking small changes. It involves new genetic information, coordinated mutations, and systemic developmental shifts, none of which have been directly observed or have any evidence outside of storytelling. And the fossil record flat-out contradicts the story of slow, gradual evolution—during the Cambrian Explosion, all major animal groups appear suddenly and fully formed, with no traceable ancestors beneath them.
Genetically speaking, microevolution involves changes in allele frequency within a gene pool—shuffling or losing existing information. Macroevolution would require
new genetic information, novel genes, and the reprogramming of developmental biology (evo-devo). But mutations are overwhelmingly neutral or harmful, and random copying errors don’t build the kind of complex, integrated systems needed for new organs or body plans. So macroevolution isn’t just ‘micro over a long time’—it requires a mechanism we’ve yet to observe.