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Originally Posted by dcl
damian1727: if energy/matter can neither be created or destroyed in our universe, then how come it is here at all?
dcl: Science has no answer for that question.
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Here, your answer is correct. I think accomplished physicists may ask themselves the same question - "Why is there anything at all?" or "Why isn't there nothing?" but only when they're in philosophical moods, I suppose.
Quote:
Originally Posted by dcl
...ran the movie backward as far as knowledge would allow and sensibly stopped there to avoid uninformed speculation. That took it back to 10-43 sec....
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Here your answer is incorrect. We can't get anywhere near 10
-43 sec. From my recent reading on the subject, many major names in the field all seem to agree on how the movie would rewind back to 1 second. If I'm not mixing my units, I believe our most powerful accelerators can simulate conditions somewhere around 10
-15 sec. Beyond that, we have no observational data, and various physicists have different ideas.