Sultan Bhargash
Trickster Reincarnated
We've endured many magnetic reversals, several since humans evolved into their modern form but none in recorded history. Most likely, you will have to buy brand new batteries.
Originally posted by Renata
*Sigh.*
Which article? I certainly never advocated physical pole reversal, only pole shifting which is well supported by the evidence accumulated by Mr Hapgood.Idea #1: Magnetic pole reversal has nothing to do with physical pole reversal, crustal slippage or anything else mentioned in the article
#2 (maybe): Precession/nutation of the earth's axis. The earth's rotational axis precesses like a top over a period of roughly 26,000 years and also wobbles a bit (nutation) over a range of a few degrees.
... effect of the moon keeps the earth from ever varying more than those few degrees from its average tilt; it would never physically flip over unless the moon were to disappear (and even then it would be far from a sudden thing).
#3: Plate techtonics. An embryonic form of this theory is what I think Einstein was talking about.
That good enough for you, stormbind?
Thank you, but what I was confused about was how exactly the skin of oranges is able to move around on the flesh, not pole-shifting.Originally posted by stormbind
This is my theory:
~snip~
Originally posted by Little Raven
Humans have been through this before.
There is absolutely no evidence that Siberia, northern Canada, and northern Alaska suddenly became colder about 12,000 B.P., much less shifted.
No, it's not like that, the actual movement changes very slightly with a polarity change, it doesn't "reverse velocity" like you say it does. Only the orientation of the magnetic stuff changes, it's like a millions of little magnets fliping over, not one huge magnet. Otherwise it would cause nasty changes in earths rotation.Originally posted by stormbind
It wouldn't be a sudden velocity reversal on the outside. It would be a gradual slowing.
It's like two magnets being pushed together, one of them flips around. The one that flips is on the inside but it's only liquid (molten metal) so the outside is affected but is still bound the law of inertia - it doesn't just emmediately change direction.