Apollo 15 astronauts collected tiny green glass beads from the Moon in 1971; more than 35 years later scientists found evidence of water inside, changing what we knew about the lunar interior

Apollo 15 astronauts found unusual green flecks on the Moon’s surface. These flecks were later identified as volcanic glass beads containing trapped water. Researchers discovered hydrogen within these tiny beads, proving lunar water existed. This finding challenged the long-held belief that the Moon was extremely dry. The discovery revealed significant water presence deep within the Moon’s interior.
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