How NASA has kept Apollo moon rocks safe from contamination for 50 years

Lunar samples have solved plenty of mysteries, with more answers to come

Lisa with moon rocks

BEHIND GLASS  Science News astronomy reporter Lisa Grossman visits the pristine sample lab at NASA’s Johnson Space Center in Houston in March. The display case holds rocks collected during Apollo 15 and 16. The 1.5-kilogram chunk of volcanic basalt in the center is 3.4 billion years old.

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