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Sunday, December 29, 2013

Yet another conundrum

Here is yet another conundrum for evolutionism --

Cornelius Hunter has a recent post concerning the "sixth sense" of magnetoreception that many animal possess, with a focus on how this ability relates to evolutionism Evolutionists Conclude Magnetoreception Evolved (After They Doubted its Very Existence) ... but then, they “conclude” that about everything, once they stop denying that it exists.

Hunter: -- ... It is also another example of the failure of evolutionary theory. Not only is there no scientific explanation for how such magneto reception, processing and decision-making could evolve, but the entire idea runs counter to evolution. Fifty years ago evolutionists ridiculed the idea that animals could detect such weak signals and use them in a sort of geographic information service. Now they claim it is all a result of blind evolution. As one evolutionist explained regarding the loggerhead turtles, “We think different areas along the migratory pathway are marked by unique magnetic signatures, and the turtles have evolved responses that are coupled to these signatures.” They think that not because the turtle’s magnetoreception appears to be a product of evolution, or that they have anything close to a scientific explanation for how it could have evolved. They think that because they believe evolution is true.

That is the extent of evolution’s contribution to this research.

Here is the conundrum for evolutionism -

Supposedly - it’s (presently) Gospel in evolutionism -- the earth's magnetic field periodically collapses and reverses.

So, one must wonder, given Darwinsm/evolutionism, and give the periodic collapse and reversal of the earth’s marnet field, how do there happen to be species that rely upon magnetoreception to get to where they need to be when they need to be there (for instance, their breeding or spawning grounds)?

A collapse and reversal is supposed to happen on an average of 450,000 years. That hardly seems like time enough for magnetoreception to randomly evolve-and-fix. Or, even if it were enough time, about the time a species came to get good at it and to depend upon it, the magnetic field would collapse and reverse.

According to the Wickedpedia (no foe of evolutionism, that!) - " A geomagnetic reversal is a change in the Earth's magnetic field such that the positions of magnetic north and magnetic south are interchanged. The Earth's field has alternated between periods of normal polarity, in which the direction of the field was the same as the present direction, and reverse polarity, in which the field was the opposite. These periods are called chrons. The time spans of chrons are randomly distributed with most being between 0.1 and 1 million years with an average of 450,000 years. Most reversals are estimated to take between 1,000 and 10,000 years. The latest one, the -BrunhesMatuyama reversal, occurred 780,000 years ago. A brief complete reversal, known as the Laschamp event, occurred only 41,000 years ago during the last glacial period. That reversal lasted only about 440 years with the actual change of polarity lasting around 250 years. During this change the strength of the magnetic field dropped to 5% of its present strength."

So, according to evolutionism, a mere 41,000 years ago, there was a brief (i.e. 440 years) complete reversal of earth’s magnetic field. Now, while 440 years (or 250 years) may be “brief” on geological time-scales, in the life-span of an organism which needs to be at the right places -- feeding grounds and/or breeding grounds -- at the right times, this span of time of being unable to rely upon its magnetoreception to get there equals species extinction.


Crusader Rex said...

The subject of earth,s magnetism seems to be largely taboo within the Eliminative Materialist sects. I have brought the subject up several times in relation to climate issues and have been ridiculed by the adherents scientism. I can only infer that the earth magnetic and radioactive properties somehow threaten the 'science is settled' position.
Interesting post, Ilion. The migrations would seem extremely problematic considering the time scales involved in these shifts and reversals.