Page 28 - The Evolution Impasse 1

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Analogous organ wever, his assertion rests on no proof
and was merely a supposition made on
Some organs superficially appear to
the basis of external similarities. From
be similar and perform the same functi- Darwin’s time until now, no solid evi-
on. For example, their wings allow but- dence has been discovered to substantia-
terflies and birds to fly; and both cats and te these assertions.
beetles use their legs to walk. But these In the light of this, evolutionists no
creatures have completely different gene- longer call these organs homologous—
tic and anatomical structures. This kind that is, coming from some common an-
of similarity is only superficial. 20 cestor—but analogous, or showing simi-
Darwin stated that creatures with si- larity without being related through evo-
milar (so-called homologous) organs lution. (See Morphological homology.)
were related to one another by evolution, But many species among which evo-
and that these organs must have been de- lutionists have been unable to establish
veloped in some common ancestor. Ho- an evolutionary connection do have si-
milar (homologous) organs. The wing
is the best known example. Bats,
which are mammals, have wings and
so do birds. Flies and many varieties
of insects have wings, but evolutio-
nists have not been able to establish

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wings came to be by chance in four in-
dependent groups: in insects, flying
reptiles, birds and bats. When evolu-
tionists try to explain these four instan-
ces by the mechanisms of natural se-
lection/mutation and assert a similarity
of structure among them, biologists
come up against a serious impasse.
Mammals are one of the most con-
crete examples that draw the evolutio-
nary thesis into a blind alley. Modern
biology accepts that all mammals are
divided into two basic categories: tho-
THE EVOLUTION IMPASSE I