Just like we know about every animal on earth?
Just like we know about everything in the universe?
Just like we know everything about everything?
Cmon dude... you're a.ssuming that because we don't know about something its fake.
We learn new sh*t every day...
And we haven't even scratched the surface of the universe... we haven't even dipped our toes in to test the waters....
At the same time, you're a.ssuming that because we don't know about something it's real. "This HUGE universe! There HAS to be something out there!"
In fact, it's just a fallacy of ignorance.