So, what if maybe, sometime there was a species of bird. And this species of bird flew out of Earth's atmosphere. But it didn't die when it hit space; it adapted to it's new environment. And then maybe it landed on, say, Pluto or something, evolved, and now anthropomorphic cats are planning their attack on us. That explains that blip that some old guy saw on his spacedar 60 years ago.
TL;DR TALKING CATS ARE GONNA KILL US ALL