[bromgeksan]

Some of you perhaps heard of this theory before. It is an idea that the Earth is hollow and perhaps has a habitable surface on the inside and perhaps an inner Earth sun. Some people believe there is advanced civilizations living there. It is also purported that the Mammoth cave in Kentucky leads all the way to the Hollow Earth. Who knows? No one has found an end to the Mammoth cave yet and seen truly where it leads at the deepest point yet?
Anyways, here are some videos that you should watch if you want to learn more about the Hollow Earth theory:

Hollow Earth documentary:
http://www.youtube.com/watch?v=uEhc17CKnmk

How the Hollow Earth might look like:
http://www.youtube.com/watch?v=ubKFmIDBMjU

Adventure into the Hollow Earth:
http://www.youtube.com/watch?v=-l1IB4jYZGI&feature=plcp

Finally, perhaps the best video about the Hollow Earth yet. You must watch this!:
http://www.youtube.com/watch?v=0YGftNotj0w