How did the environment for the Tiangong bacteria differ significantly from the *Bacillus* strains found on lunar samples?
Answer
The bacteria on Tiangong endured daily cycles of vacuum, thermal stress, and solar/cosmic radiation bombardment.
Unlike lunar samples, which were shielded by rock or dust, the bacteria on Tiangong were constantly subjected to the daily cycles of vacuum, thermal stress, and bombardment from solar and cosmic radiation.
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