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Author Topic:   A question concerning Evolution
Chiroptera
Inactive Member


Message 4 of 38 (78928)
01-16-2004 6:06 PM
Reply to: Message 1 by Soracilla
01-16-2004 5:41 PM


If you go back far enough to the beginnings, it appears that the universe and all that is in it came into being at a particular point in time called the Big Bang.
How that came about nobody knows. Our current physcial laws only work to within a fraction of a second after Big Bang, and so we cannot as yet say anything meaningful about the universe before that, including the origin. It may be that any physical law that we ever come up with will always be limited to some fraction of a second after Big Bang, so we may never know how the universe, and all that is in it, came to be. Or, we may derive physical laws that allows us to say what happened right up to Big Bang, but because all of our experiments must be done at finite temperatures and densities, we will never be able to truly test the theories validity to the Big Bang. Plus, although the physical laws may tell us what happened immediately after Big Bang, they may give no clue as to the actual origin "event".
So, we don't know. We may never know. Or, we may know someday.

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Chiroptera
Inactive Member


Message 19 of 38 (79045)
01-17-2004 12:00 PM
Reply to: Message 16 by Percy
01-17-2004 8:48 AM


I kind of remember Roger Penrose explaining this in The Emperor's New Mind. If the the entropy is extremely low, then the matter will not be trapped in the "black hole" but will expand out of it. The original universe seems to have been "created" in a state of fantastically low entropy.

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Chiroptera
Inactive Member


Message 25 of 38 (79102)
01-17-2004 5:22 PM
Reply to: Message 24 by Percy
01-17-2004 5:11 PM


Re: The Big Bang Singularity and a Black Hole
Interestingly, it is now believed that there is a universal repulsive force, being labeled as "dark energy". Although it was too weak at the beginning to be the answer to the question you are asking, this repulsion increases as space expands. It is believed, if I remember the article in Science correctly, we are now in an era where the repulsion is greater than the gravitational attraction.

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Replies to this message:
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