In message , Tim Streater
writes
AIUI, there are about 26 physical constants (such as speed of light)
for the values of which there is no theoretical explanation known
today. That is, it's as if God (I use the term for convenience) has 26
knobs to turn to set these values and launch the universe. They could
have any values, these constants, and life would not be possible in
most of the resulting universes.

Which raises the interesting question of whether alternative universes
exist in which some or all of those constants have different values.
--
John Hall "George the Third
Ought never to have occurred.
One can only wonder
At so grotesque a blunder." E.C.Bentley (1875-1956)