Space & the Universe
How many kilograms of Moon rock and soil did the six Apollo landing missions bring back to Earth in total?
Answer
382 kg
NASA still keeps most of it sealed in a vault in Houston, and deliberately saved some samples untouched for decades so future scientists with better instruments could open them fresh — one vacuum-sealed core wasn't unsealed until 2022.
Source: NASA Johnson Space Center Astromaterials Curation
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