Richard Hoover of NASA claims to have found alien microbes inside of a meteorite (right side, left side is a real terrestrial bacterium).

I predict 2 types of responses: pathological rejection and people who equate this with sentient space faring beings.

Frankly I think panspermia is the only theory of evolution which makes much sense. Integrate evolution over 10 billion planets and 10 billion years and you get believable statistics.