‘Disclosure Day’ ending explained: What really happened in Steven Spielberg’s alien thriller?

What does that final moment mean and why are people so conflicted by the film?
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Alien: Earth: Adapting Ridley Scott's original 1979 ending

FX and Hulu's Alien: Earth is returning for a second season, and it has a chance to finally fulfill one of Ridley Scott's plans for the original Alien 47 years after the fact. The ending of the ...