Start listening with a 30-day Audible trial and your first audiobook is free. Visit http://www.audible.com/isaac or text "isaac" to 500-500. The Silurian Hypothesis contemplates how long the ruins of a civilization would be detectable, on Earth or even other worlds,...
Use my link http://www.audible.com/isaac or text isaac to 500-500 to get a FREE audiobook and 30-day free trial! Ever since we started finding fossils of long extinct species we've dreamed of getting to meet them, either by finding some secluded group of survivors,...
Continuing our look at possible alien civilizations, we examine extinct alien civilizations and the possibly of finding them and exploring their ruins to learn about them. We will also contemplate the possibility of bringing them back, and the conundrums that raises....