Hello, SFIA audio listeners. In this month's Nebula exclusive, big alien theory,

we're asking the reason alien civilizations might be rare is because most aliens are huge.

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It seems like in most alien invasions of Earth and sci-fi, the invaders have pretty

dumb reasons for invading, but does that mean Earth is safe because there are no good

reasons to invade us, or just they were not being sufficiently creative.

Welcome back to our Alien Civilization series here on Science and Futurism with Isaac Arthur

for another sci-fi Sunday on SFIA, and I am your aforementioned host, Isaac Arthur.

On our sci-fi Sunday episodes, we try to relax our scientific wriggle and try to look at concepts

in science fiction and see how realistic they are, or for that matter how unrealistic they are.

And when it comes to alien invasions of Earth, they are sort of a champion of unrealistic sci-fi,

right up there with fighting giant monstrous

kaiju and equally giant robot mecca, or fighting off zombie hordes, both of which are often

alien invasion scenarios too.

The invasions often seem dumb, both how they happen and why they are done in the first place.

The motivation and goals for aliens to invade often seems incredibly stupid,

and when it comes to tactics and strategy during the invasion, they often seem to ignore the

first rule of warfare, and indeed so too to the defenders. So I thought we would spend today

discussing the dumbest alien invasions of fiction, and why they are strategically

and scientifically flawed, as well as some examples of better reasons and methods.

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