
“Darwinian evolution — whatever its other virtues — does not provide a fruitful heuristic in experimental biology. This becomes especially clear when we compare it with a heuristic framework such as the atomic model, which opens up structural chemistry and leads to advances in the synthesis of a multitude of new molecules of practical benefit. None of this demonstrates that Darwinism is false. It does, however, mean that the claim that it is the cornerstone of modern experimental biology will be met with quiet skepticism from a growing number of scientists in fields where theories actually do serve as cornerstones for tangible breakthroughs.”[3]Some evolutionary biologists would also disagree with the NAS’s claims in its new booklet that evolution has provided much agricultural, medical, or other commercial benefits to society. As evolutionary biologist Jerry Coyne admitted in Nature, “improvement in crop plants and animals occurred long before we knew anything about evolution, and came about by people following the genetic principle of 'like begets like'.”[4]
“No wonder paleontologists shied away from evolution for so long. It never seemed to happen. Assiduous collecting up cliff faces yields zigzags, minor oscillations, and the very occasional slight accumulation of change--over millions of years, at a rate too slow to account for all the prodigious change that has occurred in evolutionary history. When we do see the introduction of evolutionary novelty, it usually shows up with a bang, and often with no firm evidence that the fossils did not evolve elsewhere! Evolution cannot forever be going on somewhere else. Yet that's how the fossil record has struck many a forlorn paleontologist looking to learn something about evolution.”[21]One major event in the fossil record–left completely unmentioned by the NAS–is the Cambrian explosion, where nearly all of the major animal phyla appear in a geological instant without any apparent evolutionary transitional fossils. A recent biology textbook acknowledges that the fossil record has not given clues to help explain the origin of animal phyla in the Cambrian explosion:
“Most of the animal phyla that are represented in the fossil record first appear, ‘fully formed,’ in the Cambrian some 550 million years ago. ... The fossil record is therefore of no help with respect to the origin and early diversification of the various animal phyla.”[22]This is not the only such "explosion" in the fossil record. Paleontologists have observed a fish explosion, a plant explosion, a bird explosion, and even a mammal explosion. As leading evolutionary biologist, the late Ernst Mayr, wrote in 2001, “When we look at the living biota, whether at the level of the higher taxa or even at that of the species, discontinuities are overwhelmingly frequent. . . . The discontinuities are even more striking in the fossil record. New species usually appear in the fossil record suddenly, not connected with their ancestors by a series of intermediates.”[23] This phenomenon exists not only at the species level but also at the level of higher taxa, as one zoology textbook explains:
“Many species remain virtually unchanged for millions of years, then suddenly disappear to be replaced by a quite different, but related, form. Moreover, most major groups of animals appear abruptly in the fossil record, fully formed, and with no fossils yet discovered that form a transition from their parent group.”[24]Rather than acknowledging the general pattern of explosions in the fossil record, the NAS focuses on the few occasions where there are possible transitional forms. But plausible evolutionary transitions seem to be the exception, not the rule, in the fossil record, which is dominated by abrupt explosions of mass biological diversity. In particular, the NAS focuses heavily upon Tiktaalik, an alleged transition between fish and amphibians, but Tiktaalik has a completely finlike fin and does virtually nothing to document the key aspect of the alleged fish to amphibian transition, the transformation of fins into feet.
“Archaeopteryx is on the whole a point for Darwinists, but how important is it? Persons who come to the fossil evidence as convinced Darwinists will see a stunning confirmation, but skeptics will see a lonely exception to a consistent pattern of fossil disconfirmation.”[26]
“At best the TTSS represents one possible step in the indirect Darwinian evolution of the bacterial flagellum. But that still wouldn’t constitute a solution to the evolution of the bacterial flagellum. What’s needed is a complete evolutionary path and not merely a possible oasis along the way. To claim otherwise is like saying we can travel by foot from Los Angeles to Tokyo because we’ve discovered the Hawaiian Islands. Evolutionary biology needs to do better than that.”[46]Dembski’s critique is apt because it recognizes that Darwinists wrongly characterizes irreducible complexity as focusing on the non-functionality of sub-parts. Conversely, pro-ID biochemist Michael Behe, who popularized the term “irreducible complexity,” properly tests it by assessing the plausibility of the entire functional system to assemble in a step-wise fashion, even if sub-parts can have functions outside of the final system. The “leap” required by going from one functional sub-part to the entire functional system is indicative of the degree of irreducible complexity in a system. Contrary to the NAS’s assertions, Behe never argued that irreducible complexity mandates that sub-parts can have no function outside of the final system.
“The E. coli/S. enterica paradigm emerges remarkably intact from our survey of flagellar diversity in the postgenomic era and appears to provide a perfect example of Darwin’s epithet: ‘prodigal in variation but niggard in innovation’. We have been able to provide functional assignments to many conserved, but previously unrecognized, flagellar genes in diverse systems, emphasizing the continuity of flagellar structure and function. These observations will provide a firm foundation for future experimental studies, enabling conserved (and therefore presumably important) domains and residues to be identified. Surprisingly, we have determined the conservation of some regulatory components of the flagellar apparatus; for example, the FliA—FlgM system is common to flagellar systems spanning four bacterial phyla (proteobacteria, spirochaetes, firmicutes and thermotogales).” [47]Finally, the NAS’s abridged booklet asserts that biologists “have found intermediate forms of flagella.” But no reference or description is given for these alleged “intermediate forms of flagella,” because this claim is false. In 2006 Pallen co-wrote, “it is clear that all (bacterial) flagella share a conserved core set of proteins,” observing that “[t]his reduced flagellum is still a challenge to explain.” Pallen co-identified a core set of structural components “at the heart of the bacterial flagellum”:
"Three modular molecular devices are at the heart of the bacterial flagellum: the rotorstator that powers flagellar rotation, the chemotaxis apparatus that mediates changes in the direction of motion and the T3SS that mediates export of the axial components of the flagellum."[48]Pallen’s article further admitted that “the flagellar research community has scarcely begun to consider how these systems have evolved.” By claiming “there is no single, uniform structure that is found in all flagellar bacteria” and that there are “intermediate forms of flagella,” the NAS is promoting incorrect information about the flagellar structure, and the NAS is wrong to imply that the evolution of the flagellum is understood.
“In all irreducibly complex systems in which the cause of the system is known by experience or observation, intelligent design or engineering played a role [in] the origin of the system. . . . Although some may argue this is a merely an argument from ignorance, we regard it as an inference to the best explanation . . . given what we know about the powers of intelligence as opposed to strictly natural or material causes.”[50]The flagellum is a self-assembling, irreducibly complex microscopic rotary engine that contains parts known from human technology–such as a rotor, a stator, a propeller, a u-joint, and an engine–yet it functions at a level of efficiency that dwarfs any motor produced by humans. In any other context we would immediately recognize such an information-rich, integrated system as the product of intelligence. The NAS can only dismiss the scientific case for the design of the flagellum by distorting the facts about the structure.
“It is important to stress that the refusal of ID proponents to draw scientific conclusions about the nature or identity of the designer is principled rather than merely rhetorical. ID is primarily a historical science, meaning it uses principles of uniformitarianism to study present-day causes and then applies them to the historical record in order to infer the best explanation for the origin of the natural phenomena being studied. ID starts with observations from ‘uniform sensory experience’ showing the effects of intelligence in the natural world. As Pandas explains, scientists have uniform sensory experience with intelligent causes (i.e. humans), thus making intelligence an appropriate explanatory cause within historical scientific fields. However, the ‘supernatural’ cannot be observed, and thus historical scientists applying uniformitarian reasoning cannot appeal to the supernatural. If the intelligence responsible for life was supernatural, science could only infer the prior action of intelligence, but could not determine whether the intelligence was supernatural.”[52]Second, ID is not special creation. As leading ID theorist William Dembski writes, “Intelligent design does not require organisms to emerge suddenly or to be specially created from scratch by the intervention of a designing intelligence.”[53] Thus, intelligent design is not incompatible with common ancestry, and the NAS has blatantly misrepresented intelligent design. This also implies that the NAS makes misplaced arguments by emphatically pushing alleged transitional forms like Tiktaalik as refuting intelligent design. Regardless, Tiktaalik is not very impressive as a transitional form because, as noted, it does not document the key aspect of the alleged fish-to-amphibian evolutionary transition: the transformation of fins into feet.