[Waco]

If you accept that earth is the only civilized/advanced planet, then we made it. These are us traveling back in time from somewhere in the future? Stands to reason that we will discover how to time travel, if such a thing is possibile, somewhere in the future. Like flying was once just a dream of some in our “distant” future. 300 years? 800 yrs. 2700 yrs.? Who knows? But we made it!

[Hot Tabasco]

These are us traveling back in time from somewhere in the future?

If the future already exists then that just makes us reruns. I'd rather be visited from visitors of the future than deleted like an old Gilligan's Island episode that was TiVo'd..........

[brytlea]

OK, wait, I just figured it out. They are time travelers/tourists come to view we Earthlings from 2008. But they can’t interact with us because of course, because otherwise they would foul the space/time continuum. Or something like that.
Case solved!
susie