[Jnana]

In 2012 the next polar reversal will take place on earth. This means that the North Pole will be changed into the South Pole. Scientifically this can only be explained by the fact that the earth will start rotating in the opposite direction, together with a huge disaster of unknown proportions.

How about looking at the REAL scientific explanations? Science does NOT associate earth magnetic field reversals with a change in the rotation of the earth, nor with a change in the geographic poles, nor with any major extinction events. Magnetic field reversals are relatively common in the overall scheme of things, and appear to be a relatively benign process.

From Geomagnetism - Magnetic Field Reversals :

The Earth's magnetic field is aligned roughly along the spin axis and has an approximate dipole shape, similar to that of a bar magnet, with north and south magnetic poles. This is the normal state of affairs, but occasionally the magnetic field switches polarity, the north and south magnetic poles reverse, and the field settles down in the opposite state. The process goes by several names – "magnetic field reversal" and "polarity transition" are the most common.

Reversals have been documented as far back as 330 million years. During that time more than 400 reversals have taken place, one roughly every 700,000 years on average. However, the time between reversals is not constant, varying from less than 100,000 years, to tens of millions of years. In recent geological times reversals have been occurring on average once every 200,000 years, but the last reversal occurred 780,000 years ago. At that time the magnetic field underwent a transition from a "reversed" state to its present "normal state".

Ultimately, the occurrence of reversals must be related to changes in the fluid flow in the outer core. In fact, there is evidence, borne out by computer simulations, that fluid motions try to reverse the field every few thousand years, but that the inner core acts to prevent reversals because the field cannot diffuse as rapidly in the inner core as it can in the fluid outer core. Only on rare occasions can the thermodynamics, the fluid motion and the magnetic field all evolve in a compatible manner that allows for the original field to diffuse completely out of the inner core so that the new dipole polarity can diffuse in and establish a reversed field.

Many authors have pointed out that the dipole part of the magnetic field has been weakening during historic times, and that if the present trend continues, the dipole field will go to zero in roughly 1500 years. Some people take this to mean that we are entering a reversal. Although this possibility cannot be discounted, many investigators believe that the trend will not continue and that the field will regain its strength, as it has many times in the past.

More at link above.

Edit to add another link: When North Goes South
New computer model provides first coherent explanation of magnetic field reversal.

Just for comparison of time frames, the Age of Dinosaurs was from 230 million years ago to 65 million years ago, so the dinosaurs survived over 200 magnetic field reversals.