There is one major issue regarding the history of the earth "tipping over" that hasn't been adequately or scientifically addressed: there is a 20,000 year sun spot cycle that dramatically affects the earth's magnetic field and the core plasma that contributes to the final change in the earth's "tipping over". This sun spot cycle is more significant that previously considered and is the smoking gun in this particular scenario. If there is a 20,000 year sun spot cycle and it does have an effect to the degree that the earth "tips" there must be evidence. However, just like the dinosaur killing comet, if you don't even have a theory then you miss the evidence in front of you such as the k boundry data that was in front of the community for years until recognized.
I stated that there is a 20,000 year sun spot cycle, since it hasn't been documented then my statement is a theory but I have it on good authority and would welcome comments on the sun spot cycle.