NajaB, <br /><br />Your post is very telling and encapsulates many ideas. <br />You said, "it's wild supposition". To say the least! <img src="/images/icons/smile.gif" /><br /><br />The notion of "pyramids" and "sphinxes" abounding in Egypt AND the Americas is trying enough. The idea that SOMEHOW, these symbols seem to carry a message, across time AND space, just boggles a rational mind. And yet, there we are. Remeber Carl Sagan's suggestions: "to look much more closely at the pyramids and what some people call the Face and the city..."<br /><br />You said, further, "Wait, I suppose it is possible that tens of millions of years ago a race of intelligent beings carved a mountain into the shape of a half lion, half human face. Though one would have to wonder why, considering that neither humans nor humans exsisted yet, and never would evolve on that planet."<br /><br />Enter the notions of the Artificial crowd, including Richard Hoagland. If the Face is a construction, is it a carved mesa, or a giant archology, as Richard has suggested? Is it a badly eroded hominid face, or a "split glyph", a true sphinx, a homind/feline morph, a representation of something important, something very ancient? <br />And if this is true, and SOMEBODY depicted a hominid face long before hominids existed (by our acknowledged timelines), does this push us to Graham Hancock's idea that we are "a species with amnesia"?<br /><br />Enter again the exploded planet theory. Whether we "originated" on Mars or Earth is moot. If, however, the catastrophe that destroyed Mars also effected Earth, plunging us into the Ice Age that killed the dinosaurs, the very few remnants of that pre-historical, solar system-wide HUMAN civilization might contain clues as to how to AVOID such catastrophes in the future. Certainly worth the gamble, in my opinion. And I do NOT want to hear about budget. We have spent trillions looking for non-existant WMDs. Spending some billions on a fleet of robots with live TV fee <div class="Discussion_UserSignature"> </div>