The anime was disjointed in both dialog and action. Also, like most anime, it introduced too many peripheral characters to ever allow reader identification with the main characters. Finally, I gave up long before they ever found the treasure ... if they ever did.
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The mere fact that science may not yet adequately explain an object, event, or experience does not mean the immediate explanation should automatically default to a conspiratorial, extraterrestrial, paranormal, or supernatural cause.