Science predicts that many different kinds of universe will be spontaneously created out of nothing. It is a matter of chance which we are in.
Well first of all we did lots of studies where we show practical intelligence doesn't correlate with G. We have probably two dozen studies that practical intelligence better predicts job success than IQ.
It's only when we truly know and understand that we have a limited time on earth - and that we have no way of knowing when our time is up we will then begin to live each day to the fullest as if it was the only one we had.