Here is a simple analogy. Imagine a planetary rover lands on the north pole of a planet, and the humans controlling it wish to drive to the south pole.
Longings that are unsatisfied by the provisions of Earth are not just a weary response to our often stress-laden modern lifestyles.
What drives natural selection? Evolutionary forces. What are evolutionary forces? They’re what drive natural selection.
Most of us can correctly remember melodies and lyrics learned in childhood, even years after last having heard them.
One of the advantages we have in our study of nature is our ability to observe an entire “unpolluted” universe.