hello.
question: if an object, like an meteorite, hits the earth...
how can we tell if it was from space originally?
are there chemical tests or some indication that it had been from space?
as well as metal that may have been in space for a long time? How could anyone tell if something metallic on earth had been in space for long periods?
what if some scientist/archaeologist digs up metal on earth and claims it had been from some UFO craft, what could someone do to debunk this claim? or prove that claim?