In his own words, my uncle studies something that "you can't see,
and which isn't there anymore". As a paleomagnetist, he studies
residual traces of ancient periods in the Earth's magnetic field,
as manifested in physical items.
Richard Kerr wrote in message
<199806252336.KAA15883 at cryptic.rch.unimelb.edu.au>...
>Also, I gather that whole disciplines are devoted to studying
>are dead....anthropology and history come to mind immediately,
I'm sure that
>there are others.