With each new generation, some things become easier, while other or a new set of problems crop up. Physically speaking, sure they have it easier. Vacuums can clean all on their own. Lawn mowers are self propelled. Just about everyone has a dishwasher. Kids chores are nothing compared to what we used to do. Plus … Read more
Did you actually mean "supernatural" or merely "unexplained"?
Anyway, I'd start with sky mirages. Usually these have some pseudo-scientific explanation (atmospheric lenses and so on), but sometimes they appear to reflect not merely another place, but also another time. That is sufficiently difficult to explain that no-one has tried it yet.
You don't have to be an … Read more