Questions for ‘Will we know alien life when we see it?’

The aliens that humankind encounters will probably be small and hardy, not huge, city-killing monsters like those seen in the movies.
Grandfailure/iStockphoto
The aliens that humankind encounters will probably be small and hardy, not huge, city-killing monsters like those seen in the movies.
Grandfailure/iStockphoto
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