The questions posed in post #3, 4, & 5 are valid, but I mean for this forum to be more about the odd question. For example, here's another one, in addition to the 3 that I listed previously:

If one were to stay beneath the surface of the Earth for an extended period of time, like in a sewer or something.. when he finally comes out from that sewer (after so many years) would he be blinded by the daylight?