This is an odd prediction to make, because if it comes true I won’t be able to show anyone…

There has been a lot of fiction regarding alien invasions, and mostly, for dramatic purposes, they don’t just wipe out all humans with the press of a button.

But they would most likely have access to a relatively modest weapon that could send us back to the dark ages – and EMP. Well, a number of them, around the world, detonated high above us, and taking out every single electronic device, including computers, cars, satellites and so on.

They might do so for legal or ethical reasons, as in a mandate to not directly kill any living things.
They could do it for our own good, before we blow each other up.
They could do it as a science experiment, or for fun.

Our enemies (Russia, China, Iran etc) could also find away to achieve an EMP. It would possibly be hard to trace, hard to retaliate, and make a country very vulnerable to a traditional invasion.

So, keep you car and computer in a Faraday Cage at all times!