From the desert whispers of films like ‘Koi... Mil Gaya’ to the glowing fingertip of ‘Extra-Terrestrial’, cinema has long hinted that we are not alone. In ‘PK’, an innocent alien questions human rituals, holding up a mirror to our own absurdities. Hollywood counters with the haunting vastness of ‘Interstellar’ and the quiet arrival of the unknown in ‘Arrival’. Literature, too, has dared to imagine cosmic neighbours — from ‘The War of the Worlds’ to ‘Childhood's End’, where the sky is not a ceiling but a corridor.
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