Valid examples:

- A haunted house that science has been unable to explain
- Milk coming out of a hindu idol god that science has been unable to explain

Invalid examples:

- Virgin birth of Jesus christ. We can not experience/validate this today
- A haunted house used to exist in London in early eighteenth century. We can not experience validate today

If there aren't any then that would make the argument (that paranormal/supernatural experiences are personal and not real) even more stronger.

 Bittertruth you can never go back in Time. It violates the laws of Physics. It's called the grandfather paradox or butterfly effect. Time travel (in reality) is very different than what most people think it is. 
I don't believe that humans in the past were advanced. Of course they had good imagination based on what they saw and percieved at that time (Like they saw birds and thought of aeroplanes etc). Hell it was somewhere in 18th century when they found out what's was fire. Before that they thought it was one of the elements. So you are right in the sense that anything extraordinary (Like a comet or something would be percieved as something devine during ancient times) 
I agree that science is constantly evolving and for most practical purposes, the earth is round (If you look from space it is round). It's how and where you present the argument. 
Anyways going back to the topic, I don't know if there's supernatural. There could be since it's can't be disproved. But it's also possible that the mind is playing games on you. Whatever you choose to believe. But there's always an explanation to something and striving to find them is what makes humans intelligent. If you do hear a ghost, don't just run away but try to find if that's really a ghost or a racoon. 

* that's geomapped earth and if ocean is stripped off, that's how earth really looks like. Things are not really what it looks like.
* I don't know who you are, when scientists and engineers are now recognizing time travel as possibility. This news was surfaced last month and yes, new experiment show time travel is possible, we don't know yet how. 115 years ago, they laughed at when steam engine/train was said to ferry passengers, 200 years ago, they thought anyone crazy imagining man going to moon or another planet, 400 years ago, they thought anyone thinking that earth is round and not the center of universe be executed to death and here in the present context YEAR 2012 genuises are recognizing time travel as not something far from reality and few ignorants are being keyboard ninja throwing age old logics. 
one question:::
*do you really think human evolved from monkeys? If yes, EOD.

I just searched that news, here is the link , do research on those people working on it before throwing lame comments. here is the link http://www.thisweeknews.com/content/stories/grandview/news/2012/11/07/is-time-travel-possible-local-engineer-says-yes.html

Time travel is very much possible if there is parallel reality. Most scientists have agreed on the possibility of the existence of parallel universe. Knowing things way before it happens is also a sort of time travel effect, your subconscious dwell in parallel universe at least to say for some people who precisely averted next day dire consequences following their last night's dream , a state when your inner conscious wakes up and your physicality turns off. For many it's nothing but mere daily routine of going to bed and waking up, for some it's dwelling in parallel timeline and seeing things way before it's happening. This is sort of travel travel effect for me.

Now, physically going through the rip/vortex in the fabric of space and time.. and entering to different point of this linear time, that's something I'm personally dreaming to get materialized, and scientists are giving 'GREEN UPs' for its possibility.

 >>when a tree falls in the forest and there is noone to hear it, does it make a sound? 

Yes. Put a sound recorder in the forest. It will record the sound when a tree falls. Reality is true whether you are in the forest or not.

On the other hand, a video camera will not capture the ghost that someone said was in the room. Ghost is personal experience.

That Sir is a philosophical/scientific question that has become a rhetoric these days. You might wanna google it to see the various discussions about it.

"Reality is True" is something like a blunder mistake.

Have you really done a research about the paranormal?. There are many such videos of ghosts and UFOs. Not all have been proved fake. You can check many on youtube or google for such information.   

 Bittertruth,
I never said you can't time travel. I just said that you cannot travel BACK in time because of laws of physics as it stands now. Maybe in 500 years our physics may change and prove otherwise. 
And about me, I am someone who has a lot of passion for physics. So I made the correction. 
And I'm glad you are reading up on physics as well. It's such a noble subject. 

couldn't agree more, physics is what's gonna make us interstellar one day, will be the answer to all superstition