The prospect of aliens visiting Earth has been percolating through human thought for decades, thanks to countless sci-fi books and movies, such as the newly released film "Arrival." But it's still not clear how we would deal with the real thing.
The prospect of aliens visiting Earth has been percolating through human thought for decades, thanks to countless sci-fi books and movies, such as the newly released film "Arrival." But it's still not clear how we would deal with the real thing.
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