"Atlantis and Lemuria"

I recently finished a book by renowned psychic Sylvia Browne, "Secrets and Mysteries" of the world. Many interesting secrets and mysteries indeed! One of the areas of mystery and intrigue dealt with the lost continents of Atlantis and Lemuria. The continent of Atlantis located in what is now the Atlantic Ocean existed approximately 500,000 years ago with the prime of their civilization being approximately 12-15,000 years ago. Edgar Cayce,"the sleeping prophet" also was known for his thoughts on Atlantis and Lemuria. Lemuria was said to have been located in what is now the Pacific Ocean.

Atlantis was apparently quite an advanced civilization with computers far more advanced than are found in today's society. Atlanteans were said to have had a lifespan of 800 years and were said to have been 8 to 12 feet in height. According to Sylvia Browne, the Atlantean culture had sky cars,nuclear powered vehicles, and utilized crystals to focus different forms of energy.

The Lemurian culture was more spiritual than the technological Atlanteans as they emphasized art, music, and spirituality.

Both continents are said to have vanished in part due to polar shifts and tilts causing these continents to sink under the respective oceans. Sylvia Browne's spirit guide "Francine" says that the polar tilts occur every 12,000 to 15,000 years with the next polar tilt expected around the years 2020 to 2030.

Time will tell. What do you think? Is Atlantis part of the earth's past history or just a myth perpetuated and somewhat popularized by the song "Atlantis" as sung by the folk singer "Donovan"? Does this all sound to you "unbelievable"? It is hard to fathom that there were advanced cultures from a long time ago but is this any harder to believe than dinosaurs roaming the pre-historic Earth?