A Quote by Paul Davies
I suppose my interest in looking for life elsewhere in the universe really dates back to my teens. What teenager doesn't look up at the sky at night and think am I alone in the universe? Well most people get over it, but I never did and though I made a career more in physics and cosmology than astrobiology I've always had a soft spot for the subject of life because it does seem so mysterious.
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Astrobiology is the science of life in the universe. It's an attempt to scientifically deal with the question of whether or not we're alone in the universe, looking at the past of life, the present of life, and the future of life. It's an interdisciplinary study incorporating astronomy, biology, and the Earth sciences.
I look up at the night sky, and I know that, yes, we are part of this Universe, we are in this Universe, but perhaps more important than both of those facts is that the Universe is in us. When I reflect on that fact, I look up — many people feel small, because they’re small and the Universe is big, but I feel big, because my atoms came from those stars.
You know; when I look at the night sky and I see this enormous splendor of stars and galaxies, I sometimes ask the question, well how many worlds are we talking about? Well do the math, there are about 100 billion galaxies that are in the visible universe and each galaxy in turn contains about 100 billion stars, you multiply and you get about ten billion trillion stars. Well I think it is the height of arrogance to believe that we are alone in the universe, my attitude is that the universe is teaming, teaming with different kinds of life forms
A scenario is suggested by which the universe and its laws could have arisen naturally from nothing. Current cosmology suggests that no laws of physics were violated in bringing the universe into existence. The laws of physics themselves are shown to correspond to what one would expect if the universe appeared from nothing. There is something rather than nothing because something is more stable.
If we're looking for intelligence in the universe I think everybody assumes that this has to start with life and so the question is: "How likely is it that there will be life elsewhere in the universe?"
Given the millions of billions of Earth-like planets, life elsewhere in the Universe without a doubt, does exist. In the vastness of the Universe we are not alone.
I grew up in New York City where there is no night sky. Nobody has a relationship with the sky, because, particularly in the day, there was air pollution and light pollution, and you look up, and your sight line terminates on buildings. You know the sun and maybe the moon, and that's about it. So what happens is that I am exposed to the night sky as you would see it from a mountaintop, and I'm just struck by it. Suppose I grew up on a farm where I had that sky every night of my life - then you're not going to be struck by it. It's just the wallpaper of your nighttime dome.
The universe and the Laws of Physics seem to have been specifically designed for us. If any one of about 40 physical qualities had more than slightly different values, life as we know it could not exist: Either atoms would not be stable, or they wouldn't combine into molecules, or the stars wouldn't form heavier elements, or the universe would collapse before life could develop, and so on...
There are two questions that get to us all: Are we alone in the Universe? And, where did we come from? For me, science provides a much more satisfactory way to seek answers than does any religion I've come across. With that said, the universe is mysterious and wonderful. It fills me with reverence for nature and our place among the stars; our place in space.
One can imagine that God created the universe at literally any time in the past. On the other hand, if the universe is expanding, there may be physical reasons why there had to be a beginning. One could imagine that God created the universe at the instant of the big bang, or even afterwards in just such a way as to make it look as though there had been a big bang, but it would be meaningless to suppose that it was created before the big bang. An expanding universe does not preclude a creator, but it does place limits on when he might have carried out his job!
From this outer edge of his life, looking back, there was only one remorse, and that was only that he wished to go on living. Did all dying people feel this way, as if they had never lived? Did life seem that short, indeed, over and done before you took a breath? Did it seem this abrupt and impossible to everyone, or only to himself, here, now, with a few hours left to him for thought and deliberation?
Most of us think that decisions such as where shall I live, with whom shall I partner, what shall I pick as a career for my life are the most important decisions that we make. But from the point of view of the universe these decisions are not that important. Within you, you have already made decisions about who you are, what the universe is and how you will relate to other people and how you will relate to the universe and these decisions are creating consequences in your life moment by moment.
Is mankind alone in the universe? Or are there somewhere other intelligent beings looking up into their night sky from very different worlds and asking the same kind of question?
Even as a child, she had preferred night to day, had enjoyed sitting out in the yard after sunset, under the star-speckled sky listening to frogs and crickets. Darkness soothed. It softened the sharp edges of the world, toned down the too-harsh colors. With the coming of twilight, the sky seemed to recede; the universe expanded. The night was bigger than the day, and in its realm, life seemed to have more possibilities.
Most people are fascinated by what I did as a teenager, but when I look back at my life, I don't think very much about those years. I was an opportunist and got away with things because I was very young, but I went to prison and came out and remade my life.
The universe has really never made things in ones. The Earth is special and everything else is different? No, we’ve got seven other planets. The sun? No, the sun is one of those dots in the night sky. The Milky Way? No, it’s one of a hundred billion galaxies. And the universe - maybe it’s countless other universes.
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