I can't say anything on the "pole shift" theory, although it sounds mightily unlikely to me. However many zillion tons of planet has an *awful* lot of rotational inertia. To stop it on its axis and start it spinning on a different axis would take vast amounts of force. This sudden movement would not leave the Earth's inhabitants intact and shivering, it'd splatter them all over the scenery! An analogy would be taking a corner at speed - if you had an egg on the dashboard, it'd splat against the opposite side with some force.

He's also utterly incorrect that gravity doesn't exist. He can speculate that there's some other force holding the solar system together if he wants - if this other force happens to look like gravity and behave like gravity, then fine, this could be possible. But gravity has been proven to exist in numerous experiments on Earth, by suspending test masses a known distance apart and measuring the force exerted between them (it's been repeated many times to get more accurate calculations of the force). And I really doubt any of these test masses happened to be a black hole!

And then we come to his theory of there being ancient civilisations, as advanced as ours. "With few humans left, technological development is lost without trace, and man has to revert to stone-age conditions." I'm sorry, I can only say BULLSHIT!

Unless there isn't a single human left with technical abilities, I think not. Certainly the humans left after such an incident would be in a bad way, but the remains of their technology would be all over the place, and the people left would still remember how to do stuff. Consider if the world got trashed today, and say all electrical power had gone, and every microprocessor and circuit was trashed, and all records were lost. Every hardware store (and most homes) across the world still has an adequate stock of hand tools, and the trashed remains of buildings would provide plenty of raw materials. This would not only let people rebuild their homes, but could be used by the technically-minded to construct manufacturing facilities from which further hand tools can be produced. From there, we're looking at simple batteries and simple hand, animal or wind-powered generators providing electricity.

Bottom line, such a disaster would worst-case knock us back into the Victorian days of science and engineering. Stone age? I think not, somehow.

Graham.