re: Crop Circles
Could it involve a hesitation on the part of conservatives to embrace the unconventional? As conservatives, they tend to favor (conserve) the established and the traditional, don't they?
Liberals on the other hand may be more willing to look beyond the realm to which conservatives often deliberately confine themselves.
Obviously that's a gross generalization and it's pretty easy to find exceptions. The invasion of Iraq, for instance, involved a conservative movement which wanted us to go against the [admittedly still evolving] traditions of international relations, and which gave rise to many liberal voices advising us to stay the more traditional course of diplomacy.