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| Apollo 11 mission in July 1969. |
From Denny: Apollo missions astronauts landed on the moon back in the 60's and 70's, gifting Earth's scientists with loads of moon rocks when they returned from their harrowing journeys.
Scientists were shocked to discover those rocks displayed magnetic properties. How could that be?
They also figured out that some of those moon rocks could possess magnetic north and south as well as individual magnetic fields. That sure started some serious scientific head scratching as to how this could be a fact.
