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The kites are interesting, but they must have made tacking a bugger.
When the Lunar Prospector probe was deliberately crashed into the south pole of the Moon by NASA in the late '90s scientists were ecstatic about the ambiguous traces of water ice locked in the Antarctic lunar soil. Clearly the whole thing could have been sorted out much quicker if Armstrong et al had just kept their eyes peeled for the rotting keels of ancient lunar day-