Time Lines give us a sobering view of human civilization
and, in fact, can make a person very pessimistic.
If the time is
extended back far enough, humankind disappears & we are looking at vast
periods of time with their earthly & cosmic upheavals and we cannot help
but think ahead a few thousand years to when man's brief presence on the earth
is over & then, thousands of years more of earthly & cosmic upheavals
onwards towards apocalypse.
Very sobering.
JLS