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*Originally posted by queer: *
if i'm not mistaken, there are atleast 4-5 kinds of intermediary fossils known already (almost all of them coming from india and pakistan). i agree, 4-5 is in all likelihood not a complete evolutionary pathway, but since they show a gradation from legs to flippers, shrinking and disappearance of hind limbs, and gradual appearance of other whale-like features, it would be hard to not argue that almost all the unearthed fossil evidence seem to suggest evolvution.
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i don't see how u can base your conclusion only on 4-5 fossils and to state that 'it would be hard not to argue...' I think there are many equally valid other explanations, but because of wishfull thinking we 'fit' in the fossils into the theory we want them to prove. for the same matter, these 4-5 fossils might be of animals that came after each other but weren't each others descendents. Another guess could be that those fossils are so much degraded that they shrink and show malformation which we interpret as evolution. I mean the older the bone gets, it could be possible that the bone shortens, and we see that as a proof of regression due to evolution.
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evolution can only help battle environmental changes that are slower than survivable mutation rates. even before humans were on the scene, changes in the environment have driven millions, if not billions of species to extinction. and humans hunting whales has been a very very very recent phenomenon in evolutionary time spans. hardly 100 years. my guess is, if humans are the biggest deciders of their fate, a clearly inedible whale would probably be the evolutionary survivor, and his mutants would be in contention to take over niches left by the other whales that were wiped out.
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taking your first sentenc you agree that evolution is NOT the final decider of species development. My question to you would be how come evolution has decided the course of many species for million of years, but when the human appears it falters. If you turn it around you might as well argue that the fossils are of species that were extinct due to actions of an other superior animal in the time and not due to the slow progression of evolution.
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i see what you are saying. i have problems with that though. how often do animals get put in their niches? niches so clearly undergo changes in a few thousand years. new ones are created, old ones destroyed.
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niches change slowly over time, i agree. But we don't see the rainforest change into the northpole (agreed the ice age might do that, but then all animals die as well and with them evolution). I said above already I agree with the notion of intra-species development and adaption to the environment, but i clearly cannot see a cheetah transform into a shark or vice versa. Similarly no experiment or research has shown that e.g. TBC-bacterium deveoped from a precursor.
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why are the animals in geographically close niches having similar conditions show a lot more similarity than idential niches that are separated spatially onto different continents? different kinds of fish would make an excellent example of this. you will find the continents split away into various almost "feudal" families that have their subfamilies occupying almost all niches on their continent, while the other continent has the very same niches occupied by another family.
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i actually think that this supports the contra-evolution view. Because if evolution chose THE 'optimal' mutation to carry on, then the fish in different continents with similar conditions would have been the same, because THAT one mutaiton would have meant the best survival chances - and this latter is independent of geographical location, but dependent on environment, which is the same for both!