Jonasz Mierzwinski
Jonasz Mierzwinski voted up PJ Stein's answer

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

Jonasz Mierzwinski
Jonasz Mierzwinski voted up Ray Dart's answer

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