There is still so little we know about the civilization that lived hundreds and thousand of years ago in South America that all speculations could contain some truths. But unless we discover compelling evidence, we should continue to be skeptical and let science do its work. There is a logical and clear explanation for the origin of the lines and we will eventually find it. In the meantime, I agree with ma duron, keep the fantastic explanation speculators off and don't give them any credibility. And certainly, not your money.
