I think what he means is that we know our own planet has intelligent
life, and it's the only planet in our galaxy where we can confirm it.
So, that's one planet per galaxy so far that we know of. :)
That's pretty inaccurate though isn't it? there's far more that we don't
know..
The universe could be teeming with life, or completely barren except for
our planet, even our galaxy could be, but we don't know.
So by average, wouldn't it be closer to 0, but not quiet zero? for the
number of know planets with life in the universe?
Andrew
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