Sydney, I tried hard to imagine a contracting universe behaving like a rewinding version of our expanding one, but my efforts weren't enough. Then I tried to stick to the exact event when (or where) the expanding universe stops to expand, and starts to contract. Even though I coudn't see how all the laws of physics would be subverted to make time go backwards, for instance, unless time can be explained only as a gravitational interaction.
In my very, very, I said VERY limited understanding, I see that the gravity force is the major agent when we are talking about macrocosmic events, like galaxies interacting with each other. so, I really can't imagine your time-backward-contracting universe influeced only by gravity(at least near the "turning point" event), because many other behaviors are based in other forces, like electromagnetic forces(inter-atom interactions) and the nuclear forces (intra-atoms interactions) that wouldn't be influenced by gravity.
Dragadon, just to make things funnier, let's imagine this theory: if the surface of earth was smooth like a perfect sphere, the ammount of water that exist in the world would create a layer of at least a mile, sufficient to cover any human building by the time of the "great flood" (even the Babel Tower). Now, knowing that the surface of the Earth is continuously changing because of the moving
tectonic plates, it could be argued that, at the time of the "great flood", the average altitude of Emmerse land was lower than today: remember that the Himalaia was created by the convergence of the Indian plate and the Eurasian plate, and many other mountain systems can be explained the same way, like the Andes and the North-American mountains of the west), the great depressions of the ocean floors were also created by convergent tectonic plates.
Anyway, with the right conditions, it is possible to explain a macroevent known as the "great flood" based on tectonic plates,
providing that you completely discard the well known fact that they move only a few inches a year, and it would be necessary
millions of years to make the water to flood everything, and another millions of years to make the land to rise high enough and the ocean floor to go deeper(the asian trenchs) and wider (the atlantic ocean floor), so that we would have the actual world geography, not to mention what kind of world climatic event made the polar ice to melt down and to become solid again...
A last thought: tectonic plates could move way much faster in the old days of the big flood... oh well...
[ December 27, 2001: Message edited by: Lampion ]