[Mr. K]

I have a theory that the earths melted core could only be rotating at a different speed as the result of an asteroid strike that set the outer crust in motion.

Then the outer crust springs back and forth like a swinging spring door, with a periodicity of 26,000 years. The time that they have determined that the poles seem to shift.

This would explain the ‘regular’ interval of pole shifting.

And also explain numerous civilizations coming and going, because it is the difference in speed which gives us the magnetic north and south poles. When it ‘stops’ before reversing to the opposite direction it allows the solar winds to blast away at our atmosphere.

[Lazamataz]

We are so screwed.

[Adder]

This would explain the ‘regular’ interval of pole shifting.

Or pole dancing.
Quick...shove more dollar bills in the equator.

[logi_cal869]

We are in the minority ;-)

My own theory goes a bit farther:

The government knows something for which the results are catastrophic and has been spending trillion$ since 2001 to the end of preserving ‘qualified’ survivors deep underground.

The question as to the source of this knowledge is ripe for debate.

Or, if the extreme suits those reading this, the trillion$ are funding a mass migration to another planet facilitated by another race, thereby explaining both UFO sightings and the trend to mainstream public knowledge.

Either way, my own rough math can’t account for a couple trillion$$ and it explains somewhat decades of irrational government projection and spending. Again, just a theory corresponding to a long cycle you mentioned (whether it’s 12-14k or 26-28k is debatable, but a long cycle in which I believe and cite obscure evidence of lost advanced human civilizations in support).

Personally, I strongly believe in the comet hypothesis, which puts the Earth passing through the tail of an as-yet undiscovered (??) comet which rains upon the surface of the Earth a disastrous meteorite storm - the last event having ended the most recent Ice Age - but pole-shift/core/crust effects might explain some other geographical records on a different timeline.