Does anyone have any ideas (other than it being a convenient plot device that is well established in the Superman universes, of course) why Clark can't see through lead? What is it about lead, as opposed to, say, tin (which is just above it in the periodic table), which makes it visually impenetrable for him? And why only lead and not other elements as well?
I know, I know...I am asking a lot -- I am asking for things actually to make sense in the LnC universe. This is probably yet another example of something I should not look at too closely but just swallow whole in my suspension of disbelief. Still, I was curious whether anyone might be able to come up with a plausible explanation.
Joy,
Lynn
