I don't believe in a magma filled ball Earth theory either. It simply has too many holes in it. When was the last time Copernicus'es model was proven with a physics experiment? It's funny how they demand you to prove your theory but refuse to prove theirs.
http://www.smarterthanthat.com/astronomy/top-10-ways-to-know-the-earth-is-not-flat/I saw a hyena once. They're much bigger than I thought they were.
Oh, just curious. How do you explain the Northern and Southern lights (Aurora Borealis and Aurora Australis)?