If Earth's moon becomes home to samples from beyond our world, scientists want to make sure those extraterrestrial microbes don't contaminate our planet. According to io9, a biologist specializing in invasive species has partnered with a former Pentagon strategist to push NASA to build a lunar biocontainment facility—essentially a quarantine lab for potentially alien germs. It's a practical safety approach for an era when sample-return missions from other planets could yield microbial life.

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