oIt became apparent in the late 20th century, especially after 1970, that
one could not have a functional universe
(long-lasting, able to support life) unless the values of
a large number of physical constants are very
carefully adjusted to one another.
oSome examples are the nearly perfect fine-tuning of:
nCosmic expansion & gravity
nPositive & negative charges
nThe strong nuclear force
nThe weak interaction