3 Things Sci-Fi Movies Get Right
In the movies, aliens and evil empires want to kill us. Despite their advanced technology, they end up landing ground troops to do so. Worse, the forces of evil-- alien or human-- tend to be lousy shots. How unrealistic is this?
1) Aliens who come to earth want to kill us.
This isn't unreasonable. "Hawking's Conclusion" is that aliens are hostile, "looking to conquer and colonise whatever planets they can reach".
Reaching into SF movies, though, not all aliens are evil world-conquerors. The exception is the lone exploring alien, who is befuddled by our odd ways. …