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We don't know why we are here and the context of our role in the universe, and the thought of an infinite universe. It's something the human mind can't really grasp. It's statistically impossible that there's not life on other planets.

We live on a planet that is amazing, beautiful, and full of wonder but not protected from powerful destructive forces of nature. We are capable of doing wonderful and selfless things but also self-absorbed and harmful things. This is the world we live in.

I don't know why the universe is so determined to keep my feet on the ground.

Life is abundant, and life is beautiful. And it's a good place that we're all in, you know, on this earth, if we take care of it.

This wonderful elixir of light is the thing that actually connects the immaterial with the material - that connects the cosmic to the plain everyday existence that we try to live in.

Earth as an ecosystem stands out in the all of the universe. There's no place that we know about that can support life as we know it, not even our sister planet, Mars, where we might set up housekeeping someday, but at great effort and trouble we have to recreate the things we take for granted here.

Because there is no cosmic point to the life that each of us perceives on this distant bit of dust at the galaxy's edge... there is all the more reason for us to maintain in proper balance what we have here. Because there is nothing else. No thing. This is it. And quite enough, all in all.

There is immense, powerful potential in life in this universe - especially now that we know that places like the Earth are common. And that potential, that powerful potential, is also our potential, of you and me.

We're constantly re-evaluating the potential for life. We're finding it where we didn't think it could exist, such as volcanic vents and other extreme conditions like under arctic ice. We're finding life in these incredibly harsh and dynamic conditions, so we're having to re-evaluate our own ideas of what's possible on this planet alone.

Wherever you are on Earth, there is more life present than in the rest of the known universe.