‘Although many major questions in evolutionary biology remain unanswered,’ write Ulrich Kutschera (University of Kassel) and Karl Niklas (Cornell University), ‘no credible scientist denies evolution as “fact”.’ ‘Evolution is in effect as much a scientific fact as the existence of atoms or the orbiting of Earth round the Sun,’ states a Nature editorial. In its booklet Science, Evolution and Creationism the National Academy of Sciences says much the same: ‘There is no controversy in the scientific community about whether evolution has occurred. On the contrary, the evidence supporting descent with modification, as Charles Darwin termed it, is both overwhelming and compelling.’
All this is true. But unfortunately ‘evolution’ can mean different things. What the NAS booklet has in mind is the idea that ‘the common ancestor of humans and chimpanzees was a species estimated to have lived 6 to 7 million years ago, whereas the common ancestor of humans and the puffer fish was an ancient fish that lived in the Earths oceans more than 400 million years ago’. ‘Descent with modification’, on the other hand, merely sums up the fact that species change and multiply over time as they go their separate ways. This is a world away from saying that organisms are all related to each other, or that life is just highly organised matter.
The theory of evolution is supported by so many observations and experiments that the overwhelming majority of scientists no longer question whether evolution has occurred and continues to occur and instead investigate the processes of evolution.
Evolution provides a scientific explanation for why there are so many different kinds of organisms on Earth and how all organisms on this planet are part of an evolutionary lineage.
Evolution provides an explanation for why organisms have evolved! Even if the word is intended to mean the belief that organisms all have the same ancestor, a scientific explanation should not presuppose what it seeks to prove.
The crucial distinction, we might say, is between horizontal and vertical evolution. Evidence of one is not necessarily evidence of the other. If evolution in the sense of nature creating itself has not been going on, Darwin’s theory is false; biologists and palaeontologists need to be actively seeking an alternative and guarding against being victims of pro-Darwinian propaganda. Science is about testing hypotheses and theories, not closing alternatives off: something, at least in principle, the authors of Science, Evolution and Creationism accept. ‘Any scientific explanation has to be testable. Unless a proposed explanation is framed in a way that some observational evidence could potentially count against it, that explanation cannot be subjected to scientific testing.’ Regrettably the admission accompanies a discussion that is silent about the problems of Darwin’s theory and shows no interest in exploring others except one, the creationist idea that evolution did not happen at all. A potty idea that is explored, of course, only in order that it may be debunked and Darwin’s theory seem reasonable in comparison.
- If none of them substantiates the supposed transition, evolution is likely to have taken place only on a small scale, and the nature of the fossil record has been misrepresented.
- If all of them substantiate the supposed transition, the theory of evolution is validated.
- If some examples appear to be valid intermediates but others not, we must be dealing with something different from the atheistic/pantheistic scenario whereby nature creates itself.
Evolutionists need to score 10 out of 10, creationists 0 out of 10.
|Evolutionary transition (genus)||Age (Ma)||Description||True?|
|1. Fish/amphibian (Panderichthys)||370||Intermediate between Eusthenopteron (fish ~380 Ma) and Acanthostega (amphibian ~363 Ma)||No|
|2. Amphibian/land vertebrate (Pederpes)||350||Intermediate between aquatic amphibians and terrrestrial reptiles||No|
|3. Reptile/mammal (Thrinaxodon)||230||Mammal-like reptiles showing blend of mammalian and reptilian characteristics||Yes|
|4. Terrestrial/marine reptile (Utatsusaurus)||240||Marine reptile with features transitional between terrestrial amniotes and aquatic ichthyosaurs||Yes|
|5. Anapsid reptile/turtle (Nanoparia)||260||Pareiasaur with body similar to a turtle’s||No, but…|
|126||Gliding dromaeosaur intermediate between flightless theropods and primitive birds such as Archaeopteryx||No|
|95||Snake with limbs, transitional between lizard-like reptiles and limbless snakes||Yes|
|8. Land mammal/seacow (Pezosiren)||50||Primitive seacow with both terrestrial and aquatic adaptations||Yes|
|9. Land mammals/ whales (Ambulocetus)||48-47||Links amphibious and terrestrial even-toed ungulates to aquatic whales||Yes|
|10. Apes/ modern humans (Sahelanthropus)||75||Mosaic of chimpanzee-like and hominid features||No|
The intermediate forms span large gaps, often just at the point where major evolutionary changes are required to bridge major differences in habitat (e.g. sea/land) and biological organisation (e.g. fish/reptile). If the gaps were not large, they would not be on the list – we are not concerned with intermediates within more graduated lineages, such as those of ammonites, crocodiles or horses. To repeat: that organisms have changed over time is not in dispute, and sometimes the change has been large-scale. The issue (in the case of vertebrates) is whether fish actually became animals that walked on land, and land animals severally evolved into lizards, turtles, birds and human beings.
We also need to be aware that gaps of evidence are either evidence that the transitions never happened or accidents of a fossil record that is incomplete. Since fossilisation is a rare event, only a small percentage of organisms can be expected to be present in the record. The discovery of rare species that were rarely fossilised will be even rarer.
Verdicts are given in the final column. We have not evaluated all the alleged transitions in depth and two of the conclusions are therefore tentative, but currently the score looks to be 5 out of 10, suggesting that evolutionists and creationists both need to reconsider their belief systems. Large-scale, horizontal evolution has certainly occurred, but it does nothing to substantiate the belief that humans evolved from fish.