[ryan71]

Watch the movie, "The Privileged Planet".

I think you'll all find it interesting.

[flashbunny]

So, the makers of that special were able to look at every planet, not just in our galaxy, but in the entire universe?

Any sort of life is a subject to favorable conditions...and favorable conditions are subject to, basically, odds.

So, if the conditions are "one in a million", count that up against the 100 thousand million stars in the Milky Way alone.

If you think it's one in a billion, count that against the millions and millions of other galaxies, each with billions of stars in it.