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I believe that there may be intelligent life on other planets.

When I was a little kid, we only knew about our nine planets. Since then, we've downgraded Pluto but have discovered that other solar systems and stars are common. So life is probably quite prevalent.

I believe alien life is quite common in the universe, although intelligent life is less so. Some say it has yet to appear on planet Earth.

There's life all over this universe, but the only life in the solar system is on earth, and in the whole universe we are the only men.

If this is the only planet on which not only life, but intelligent life, has arisen, that would be very unusual.

I believe in a lot of astrology. I believe in aliens... I look up into the stars and I imagine: 'How self-important are we to think that we are the only life-form?'

The discovery and investigation of life on other planets is likely to change many of our ideas about how life arose on the Earth and even what is life and its natural development.

I believe we exist in a multiverse of universes.

We're going to understand that there is life on other bodies in the solar system.