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 Originally Posted by givememyleg
is it possible for the seemingly stable laws of physics that guide our universe to change over time?
Depends what you mean. If the laws of physics don't adequately describe the observed universe, then they are updated. Unlike some institutions, when a statement made by physics is disproved, it is discarded.
At this point in the quest of physics, not much gets discarded, a lot gets tweaked. The Standard Model works so well on so many levels that it's far more likely that the statements are nearly correct than completely wrong.
Originally Posted by givememyleg
do the laws that we observe today differ from the laws that existed 1 billion years ago? 10 billion? 1 hour after the big bang?
No. No. and No. (Well, replace those with almost definitely no, as there are no certainties in science.)
The Standard Model describes the universe starting ~10^(-40) seconds after the big bang until now. That's
0.000 000 000 000 000 000 000 000 000 000 000 000 000 1 seconds.
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