[I should be asleep but leg cramps keep interfering.]
I just had a rather distracting mental image: dead anthropologists
roaming around Heaven taking a census and interviewing people, trying to
find the earliest humans present there, in order to figure out at what
point in human evolution we started having souls.
That would be an unscientific question here among the living
unless someone concocts an experiment that will demonstrate or falsify
the existence of the soul in scientific terms, but presumably a scientist
in Heaven would consider the existence question resolved (after
sufficient observation to determine what was going on), and would feel
free to continue conducting science based on the data newly available
to hir. (And, of course, if there's no afterlife after all, then there's
no scientist in the afterlife to do science there and this paragraph
becomes moot, so I don't feel bad about phrasing it as assuming the
existence of the afterlife. Pbbbt!)
I wonder what other science experiments dead scientists might wind
up performing in the hereafter.