THE CURSORIAL THEORY AND NATURAL SELECTION

 


The idea that dinosaurs turned into birds by growing wings as they hunted flies is not a comic story, but in fact, evolutionist theoreticians' most serious thesis regarding the origin of birds.

This is one of the two main explanations proposed by evolutionists as to how terrestrial reptiles began to fly. According to this theory, reptiles took to the air vertically, by hopping from the ground. The basic concept is that certain reptiles flapped their forearms very rapidly and for long periods as they chased insects, and that over the course of time, these forelegs developed into wings. Not the slightest explanation is offered, however, for how such a complex structure as a wing could have come into existence from forearms being beaten against one another in order to trap flies.

John Ostrom, a prominent adherent of the cursorial theory, admits that the proponents of both hypotheses can do no more than speculate: "My cursorial predator theory is in fact speculative. But the arboreal theory is also similarly speculative." 1 (See Arboreal Theory, the.)

Even if we assume that mutations did cause undirected changes in a reptile's forearms, it is still irrational to expect that any wing could emerge by chance through the addition of cumulative mutations. Any incremental mutation taking place in its forearms would not endow the reptile with functional wings, but would leave it deprived of functioning forearms. This would leave the animal disadvantaged (in other words, defective) compared to other members of its species. According to the rules of the theory of evolution, that deformed creature would be eliminated through natural selection.

CONJECTURAL DRAWING

Evolutionists' intermediate-form dilemma also applies to the origin of birds. According to evolutionist claims, semi-winged or partly-winged reptiles should have existed before birds. Yet had such creatures existed, the fossil record should confirm this. Yet these heroes of evolutionist scenarios are no more than imaginary reconstructions, based on no hard scientific evidence.

 (1) A dinosaur, many of which we see in the fossil record.

(2,3,4) There is not the slightest evidence that any such semi-developed creatures ever existed.

(5) A fully-fledged bird, of which we see many specimens today.

 

Furthermore, according to biophysical research, mutations take place only very rarely. Therefore, it is impossible for these deformed creatures to wait millions of years for their deficient, incomplete wings to be completed through minute mutations.

For a reptile to acquire so-called avian features, according to evolutionist claims, it would have to undergo countless mutations. Just the so-called development of a reptile's front legs into wings, for example, would demand an endless procession of gradual changes. Every mutation in the genetic information regarding the forelegs must cause certain small alterations, and each one must make them a little more wing-like, not less. For example, fur must gradually appear on the limbs, then feathers must gradually appear in future generations -first the stem and then the other components. The digits must shrink with every passing generation, and the limb must increasingly come to resemble a wing. These slow, gradual changes-in the animal's lungs, its scales turning into feathers, changes in its bone structures and other characteristics- should appear in the fossil record.

 

1- John Ostrom, "Bird Flight: How Did It Begin?." American Scientist, p. 47