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Even if the satellite survives in space for 50,000 years, how would we know that our messages are intact?

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Even if the satellite survives in space for 50,000 years, how would we know that our messages are intact?

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In July 1998, the National Grand Accelerator of Heavy Ions (GANIL) conducted an experiment whereby glass disks on which our messages will be engraved were exposed to intensive radiation. The experiment showed that the disks and their data remained intact even after they were exposed to an equivalent amount of cosmic radiation that they will undergo in 50,000 years.

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