Honestly, there's no way we can know. Personally, I'm open to the thought--but I'm skeptical that they exist.
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"We spend most of our time and energy in a kind of horizontal thinking. We move along the surface of things [but] there are times when we stop. We sit still. We lose ourselves in a pile of leaves or its memory. We listen and breezes from a whole other world begin to whisper." ~James Carroll
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