Originally posted by AThousandYoung
In 1994, Ambulocetus natans, whose name means "walking whale that swims," was described from middle Eocene rocks of Pakistan.
http://www.agiweb.org/news/evolution/examplesofevolution.html#legs
Taken from http://www.answersingenesis.org/home/area/re1/chapter5.asp
The sources of information can be found at that link.
Missing links
Evolutionists believe that whales evolved from some form of land mammal. According to Teaching about Evolution, page 18, they ‘evolved from a primitive group of hoofed mammals called Mesonychids.’
However, there are many changes required for a whale to evolve from a land mammal. One of them is to get rid of its pelvis. This would tend to crush the reproductive orifice with propulsive tail movements. But a shrinking pelvis would not be able to support the hind-limbs needed for walking. So the hypothetical transitional form would be unsuited to both land and sea, and hence be extremely vulnerable. Also, the hind part of the body must twist on the fore part, so the tail's sideways movement can be converted to a vertical movement. Seals and dugongs are not anatomically intermediate between land mammals and whales. They have particular specializations of their own.
The lack of transitional forms in the fossil record was realized by evolutionary whale experts like the late E.J. Slijper: ‘We do not possess a single fossil of the transitional forms between the aforementioned land animals [i.e., carnivores and ungulates] and the whales.’3
The lowest whale fossils in the fossil record show they were completely aquatic from the first time they appeared. However, Teaching about Evolution is intended as a polemic for evolution. So it reconstructs some recent fossil discoveries to support the whale evolution stories that Slijper believed on faith. On page 18 there is a nice picture of an alleged transitional series between land mammals and whales (drawn at roughly the same size without telling readers that some of the creatures were hugely different in size—see the section about Basilosaurus in this chapter). This appears to be derived from an article in Discover magazine.4 The Discover list (below) is identical to the Teaching about Evolution series except that the latter has Basilosaurus as the fourth creature and the Discover list has ‘dates’:
Mesonychid (55 million years ago)
Ambulocetus (50 million years ago)
Rodhocetus (46 million years ago)
Prozeuglodon (40 million years ago)
One thing to note is the lack of time for the vast number of changes to occur by mutation and selection. If a mutation results in a new gene, for this new gene to replace the old gene in a population, the individuals carrying the old gene must be eliminated, and this takes time. Population genetics calculations suggest that in 5 million years (one million years longer than the alleged time between Ambulocetus and Rodhocetus), animals with generation lines of about ten years (typical of whales) could substitute no more than about 1,700 mutations.5 This is not nearly enough to generate the new information that whales need for aquatic life, even assuming that all the hypothetical information-adding mutations required for this could somehow arise. (And as shown in chapter 9, real science shows that this cannot occur.)
Keep trying.
A religious scientist
21 Sep '07 12:06
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