1.6 A paradigm shift?
The idea of a bone-dry Moon persisted for decades as the few measurements that supported the presence of water were dismissed as terrestrial contamination. That was the situation until the 1990s, when a new generation of orbiting spacecraft started gathering data.
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See also: David Rothery talks to Everett Gibson. [Tip: hold Ctrl and click a link to open it in a new tab. (Hide tip)] In July 2014 David Rothery recorded a bonus video with Everett Gibson about lunar samples.