Get and read the book 'The Adam and Eve Story', but Chan Thomas. This is not a book of fiction, and was actually classified by the CIA for years. You can get the uncensored copy now from the Internet Archive. Chan Thomas re-released the book from a different publisher and you can get that version from the Internet Archive. Prepare to have your mind blown. It will start your research into global catastrophes and answer many questions I'm sure you have. For example, how could the ancients have created monoliths that we, even with our most sophisticated equipment of today can't duplicate. There have been many very advanced civilizations in the past that were wiped out by the global catastrophes that happen every 10 or 12 thousand years. And we're actually overdue for the next one now.