Antarctica, Lost Continents and Hollow Earth! Inner Earth And The Alien Connection

The hollow Earth concept was originally proposed in the 17th century by Edmond Halley, discoverer of the eponymous short-orbit comet that swings past Earth every 75 years or so. Halley believed the Earth consisted of several concentric shells separated by individual atmospheres, with the outermost layer having a thickness of about 500 miles. Now in the 21st century we look at what evidence there is for such a theory, including the mysterious and fable city of Atlantis. Could this strange continent lie at the bottom of our oceans?