I heard about the Hollow Earth theory... is it possible?

if not possible please explain me basic reasons... thx

No, it isn't possible. The reasons are quite simple:1. If there was so much air or space or whatever in there, everything else would collapse into it because of gravity. There's nothing holding it out that would be nearly strong enough to do so.2. If that was the case, the Earth would have less gravity than it does. We know how much gravity the Earth has, so we can tell it isn't hollow.3. We've used sonar devices to send shockwaves through the Earth and measure the ways in which they bounce around inside. If the Earth was hollow, this would show up very clearly on the instruments. However, the instruments show nothing indicating that.

I highly doubt it, otherwise where is all the magma coming from the volcanoes.

Nope -- Hell is in the center.

Inside there is a magical land inhabited by short wrinkled people, yet strong and energetic. I listened to a program on the Phil Hendrie show. He had a guest on by the name of General Johnson Jameson, who was able to penetrate below the Saskatchewan crust and on two occasions met these people and obseved their social interactions and general habits, and talked at length about their modes of dress etc. In the entire interview there was not any discussion about how the Earth could be hollow -- and I myself found the whole thing alarming, especially since I know of nothing in modern science about that.I have not even been able to find anything on the internet about this Jameson guy, but how could he go into such detail if it was not true?

just found a source can't answer yet.

Not possible. How could such a world form? Unless you believe that some higher power formed it, then anything is possible and we have no need to study science. Earth (and all the other planets) formed by accretion - first dust grains stuck together (cuz space dust is just like the dust under your bed - it sticks together quite well!). More and more dust grains stick together and you get a pebble, then a rock, then a really big rock, and other rocks come together, and eventually you've built the Earth! This will always form a non-hollow object. I can't think of any physical way a hollow Earth could have formed.

Maybe, it depends on the validity of the Hollow Head theory. It goes, if you have a hollow head then the Hollow Earth theory is possible.