The problem of alien artifacts on the Earth's Moon has been re-examined. There are many reasons why the Moon is one of the best places to possess evidences of past visitations to the inner solar system by technological alien life, and the reasons are elaborated. The Moon has not been yet examined closely enough to rule out alien artifacts. We must not be too exclusionary of candidates for more in-depth examination if aliens have deliberately camouflaged or simply discarded artifacts without intending for them to noticed. In light of this, search strategies which involve statistical examination of anomalous pixels or searches near unusual resource-bearing places on the Moon (such as the lunar poles, where there may be ice) may prove fruitful, especially if we carefully distinguish between anomalous candidates and actual discoveries of alien artifacts.
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