Archeologists100,000 years fromnow will find none of today’s skyscra-pers.Moisture will have turned steelto rust and concrete to dust.But theywill find our ceramics-porcelain sinks,glass jars,kiln-fired clay table wareand flowerpots~1-little change by time.Just as present-day scientiststrace the progress of vanished earlycivilizations~2 in part~3by changes intheir ceramics,future archeologistswill discover that in the second halof the20th century,we began to re-place metals with new a mazingly diffe- Archeologists100,000 years fromnow will find none of today’s skyscrapers-pers .Moisture will have turned steelto rust and concrete to dust.But theywill find our ceramics-porcelain sinks, glass jars, kiln-fired clay table wareand flowerpots ~ 1-little change by time.Just as present-day scientiststrace the progress of vanished early civilizations ~ 2 in part ~ 3by changes intheir ceramics, future archeologistswill discover that in the second halof the 20th century, we began to re-place metals with new a mazingly diffe-