What was it doing in Wyoming?
Professor
(On his dignity)
It was possibly overtaken there by an earthquake.
Larry
Must have been some earthquake.
Professor
Since it was thus buried in silica away from the decomposing air and moisture, it was preserved for centuries—till we happened to discover it with a pick.
Larry
You don’t say so! (He looks at it a bit awed.) When we were digging trenches in No Man’s Land we used to find....