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Author Topic:   Big Bang...How Did it Happen?
Chiroptera
Inactive Member


Message 80 of 414 (93163)
03-18-2004 2:44 PM
Reply to: Message 79 by Percy
03-18-2004 2:35 PM


Another test is the decay of the orbit of massive stars that are orbiting very close to each other, as gravity waves are emitted. This prediction has been confirmed:
quote:
General Relativity implies that some of the stars' orbital energy is being dissipated as gravitational radiation; the theory predicts precisely the observed change in orbit. This system is now considered an important test of General Relativity, for which its discoverers, Hulse and Taylor, were awarded the 1983 Nobel Prize in Physics.

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Chiroptera
Inactive Member


Message 109 of 414 (93732)
03-21-2004 7:11 PM
Reply to: Message 108 by joz
03-21-2004 6:59 PM


Interestingly, it was the red-shifts that first suggested that the universe is expaning. Once the hypothesis of an expanding universe is made, one can make predictions about future observations to test it; observations that have been verified. The Cosmic Microwave Background was predicted before it was discovered, based on the assumption of an expanding universe. We would also predict that the early universe was different than the present one; sure enough, by peering back in time (by looking at objects farther away) we do see that the universe was much different than now; for example, we don't see any nearby quasars.

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Chiroptera
Inactive Member


Message 226 of 414 (137511)
08-27-2004 8:26 PM
Reply to: Message 224 by suaverider
08-27-2004 8:19 PM


Re: Oh boy this is hard work...
quote:
Another point even if it took a million years for evolution to happen (I don't believe it) there still would have had to be one second between the nonliving matter (a rock) being nonliving then in the next second being alive
This is false. There exist things, like viruses, and even better, prions, that blur the line between living and nonliving. In the development of life from non-life there was definitely a point where we had some sort of replicating molecules that we would probably consider non-living, in the end we had the first cell which was definitely alive. But in between there were probably stages where we had replicating biochemical systems, of increasing complexity, that would be hard to definitely place into either the life or non-life categories.

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 Message 224 by suaverider, posted 08-27-2004 8:19 PM suaverider has replied

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Chiroptera
Inactive Member


Message 235 of 414 (137534)
08-27-2004 10:38 PM
Reply to: Message 227 by suaverider
08-27-2004 8:34 PM


Re: Oh boy this is hard work...
This is an article about a polypeptide that is only 32 amino acids long that can self-replicate. In other words, this is a very small protein that can replicate itself. Do you consider this single protein as living?

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