[denydenydeny]

Everyone on this thread seems to be making the same mistake. It doesn't matter if there are billions, or trillions, or quadrillions of other planets. Wihtout the exact conditions that exist on earth complex life cannot exist. In fact, as the article below points out, the Milky Way itself is very nearly unique in the high metal content of its planets. We already know that there are thousands and thousands of entire galaxies that are sterile. Please read:

Maybe we are alone in the Universe after all

[Windflier]

Wihtout the exact conditions that exist on earth complex life cannot exist.

That's a very narrow minded view. Conditions don't have to precisely replicate those on Earth for life to exist. We have multitudes of lifeforms on this very planet that thrive in conditions which are totally inhospitable to plants, insects, and animals.

The only rational conclusion one can draw from your postulate is that a planet would have to have precisely the same conditions as found on Earth, for an identical ecosystem to arise.

Different conditions, different ecosystem.

[null and void]

If you deliberately ignore that fact that the current terrestrial conditions would prevent earth’s own life from starting up, you can use those improbable conditions to prove it can’t start up anywhere else.

[dragnet2]

Everyone on this thread seems to be making the same mistake. It doesn't matter if there are billions, or trillions, or quadrillions of other planets. Wihtout the exact conditions that exist on earth complex life cannot exist.

Bull s**t.

Please stop this nonsense. The possibility of life systems existing in the universe which are vastly different than anything you're capable of imagining are a *real* possibility. I cannot believe some people on this planet, with their, "We're so special" arrogant attitudes believing their somehow unique in a universe filled with *trillions* of planetary systems.

Some humans are unbelievably arrogant and ignorant.

[Psycho_Bunny]

Complete nonsense.