Earth on It's Side

Earth might have spun on its side to keep its balance in the distant past, and could do so again, scientists reported today.
Alaska was suddenly at the equator, the thinking goes. [Graphic]
Scientists already know that the North Pole wanders over time. But a theory known as true polar wander suggests that if a very heavy object, like an oversized volcano forms far from the equator, the force of the planet's rotation would pull the object away from the axis the Earth spins around.
Should a mass such as the very heavy volcano become unbalanced, Earth would tilt and rotate itself until the extra weight moves somewhere near the equator.
Analyzed samples of ancient sediments found in the Norwegian archipelago of Svalbard show that such an event may have indeed happened in the past.
"The sediments we have recovered from Norway offer the first good evidence that a true polar wander event happened about 800 million years ago," said Adam Maloof, an assistant professor of geosciences at Princeton University. "If we can find good corroborating evidence from other parts of the world as well, we will have a very good idea that our planet is capable of this sort of dramatic change."
http://www.livescience.com/forcesofnature/060825_earth_tilt.html