Remember the old commercials, "When E.F. Hutton speaks, everyone listens?" That is usually the case when Stephen Hawking speaks in his mechanical voice, everyone listens.
After waiting until the Super Bowl thing was over, Hawking called the press and explained his theory of why we see things we call ghosts and why so many people couldn't possibly be hallucinating in every known country in the world.
"The fact is that 'Time' is a physical thing. We sometimes forget that and that there is only the here and now when that is not necessarily true.
In fact, space and time work together. I know you have heard of the String Theory but this is different.
I do not say that the String theory is wrong, I simply want to set straight what I believe is the source of so many sightings of ghosts.
Since time is physical, it can be changed. I mean, whatever we do changes whatever happens during this thing called time.
Now I have read many case histories where some of these sightings are due to legal drugs, people dreaming when they think they were awake or just brain malfunctions. But there are too many.
I tire very easily so I will make it simple. Even a Ghost can understand. Ha Ha Oh, I sometimes crack myself up. The ghosts are simply in a different time frame. Something causes a wave or warp in time and you see people who once lived in the same house, at a previous time. That's why many times they merely walk through walls, dress in old fashioned clothes. They are in their normal times dressed as they did say 200 years ago and during that time, the wall they walked through simply did not exist.
I know that there is sometimes interaction but the warp may be both ways at the same time. They are seeing a ghost or vision of the future, today.
This could also explain why we see things in the sky, etc. They WILL be there one day, but not in our time.
I must rest. One last dance and that is it. Ha Ha ha ohhhh Hawking, you kill me."
So I guess that is all from here. Now back to your time.