User blog comment:Testxyz/18/@comment-94.196.88.122-20140206191342/@comment-92.40.52.151-20140207220534

It is possible to get software for even a small home computer to predict solar eclipses, positions of the planets and even the positions of stars and galaxies, for any given date/time in the future. Ancient cultures started to record and predict heavenly events thousands of years ago. I dare say that there are astronomers and astrophysicists that carry such knowledge in their minds and can calculate future earth positions.

When I first thought about parallel universes I thought that there were two possibilities:

1. Universes where the laws of physics were drastically different, e.g. gravity might be different or not exist at all etc. The planet earth probably would not occur or be extremely different in these parallel universes. 2. Universes where the laws of physics are only slightly different, where the mass, direction, speed, rotation of a single hydrogen atom would be minutely different in a given universe to another parallel universe. In this scenario you would have to visit trillions of parallel universes to find a universe where one grain of sand would be in a slightly different position on a beach. It would be just about impossible to find a planet earth that is significantly different in any recognisable way.

I have changed my mind since, because originally I did not take the ‘life force’ factor into account. Imagine a dead planet with no life, on this planet the oceans would evaporate, create clouds, rain would fall on the mountains, erode the mountains and the rain would eventually return to the sea. Every drop of water and grain of sand would totally obey the laws of physics and not a single grain of sand or drop of water would be out of position. Imagine standing on a mountain in the pouring rain with a cup and catching the rain, you then walk some distance and pour the water from the cup onto the ground. Also imagine a mouse running along a beach scattering grains of sand. Living things interfere with the natural physical laws of nature or laws of physics, unlike on a dead planet with no life. Basically what I am saying is that a dead universe with no life would not need parallel universes or that they would be physically identical.

Theoretically for the multiverse every single action by every living thing would create a parallel universe. Perhaps this would put a constraint on an infinite number of almost identical universes. Suppose that ten thousand years ago a virus killed all species of bee or earthworm, I think that that planet earth would be totally different to our own as our earth exists here and now.

Actually I do not believe in the multiverse, I just cannot see how every single thought or action that I take can create a whole universe and that I have created billions of universes just by thinking and acting. I cannot believe that I create a whole new universe depending on whether, I do or do not, drink this cup of coffee.

There again quantum physics states that a sub atomic particle can be in two places at the same time or travel in two directions at the same time etc. If sub atomic particles can be multidimensional then perhaps the saying: ‘everything that can happen does actually happen’ is true?

Still it is just a game and the writers can do whatever they imagine can happen.