You have spent a lot of time watching science fiction that shows aliens as hostile or as presenting problems. That is a deadly serious theme.One of the techniques that directors use in controlling tone is to control pace and lighting. Costume or makeup also affects tone. The aliens in Independence Day, for example, were made to remind us of insects; but the oversized head and large eyes of the aliens in Close Encounters were designed to remind us of infants (and you would have seen the same appearance for the extraterrestrial in E.T.) Obviously, the actions of the characters ...
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