Alien

Cooper is wondering,
"Who are they?"
Is it alien?

I think ...
Maybe alien is real,
or not real.
Maybe they aren't alien.
They just us.
Or maybe we are alien.
All of us.

In the end of the Interstellar,
finally Cooper realized.
They just him.
So, maybe i am you, and you are me.
We are everything and everyone.
Stop thinking that we are different.