[b]Lawrence M. Krauss
Every atom in your body came from a star that exploded. And, the atoms in your left hand probably came from a different star than your right hand. It really is the most poetic thing I know about physics: You are all stardust. You couldn’t be here if stars hadn’t exploded, because the elements - the carbon, nitrogen, oxygen, iron, all the things that matter for evolution and for life - weren’t created at the beginning of time. They were created in the nuclear furnaces of stars, and the only way for them to get into your body is if those stars were kind enough to explode. So, forget Jesus. The stars died so that you could be here today.[/b]
On the other hand, not much here in the way of immortality and salvation.
In 5 billion years, the expansion of the universe will have progressed to the point where all other galaxies will have receded beyond detection. Indeed, they will be receding faster than the speed of light, so detection will be impossible. Future civilizations will discover science and all its laws, and never know about other galaxies or the cosmic background radiation. They will inevitably come to the wrong conclusion about the universe…We live in a special time, the only time, where we can observationally verify that we live in a special time.
Not that any of us will be around to confirm it.
A universe without purpose should neither depress us nor suggest that our lives are purposeless. Through an awe-inspiring cosmic history we find ourselves on this remote planet in a remote corner of the universe, endowed with intelligence and self-awareness. We should not despair, but should humbly rejoice in making the most of these gifts, and celebrate our brief moment in the sun.
Nope, that doesn’t work for me. In fact, not even close.
If we wish to draw philosophical conclusions about our own existence, our significance, and the significance of the universe itself, our conclusions should be based on empirical knowledge. A truly open mind means forcing our imaginations to conform to the evidence of reality, and not vice versa, whether or not we like the implications.
Sure, that will catch on.
I like to say that while antimatter may seem strange, it is strange in the sense that Belgians are strange. They are not really strange; it is just that one rarely meets them.
Any Belgians here?
Any antimatter?
In science we have to be particularly cautious about ‘why’ questions. When we ask, ‘Why?’ we usually mean ‘How?’ If we can answer the latter, that generally suffices for our purposes. For example, we might ask: ‘Why is the Earth 93 million miles from the Sun?’ but what we really probably mean is, ‘How is the Earth 93 million miles from the Sun?’ That is, we are interested in what physical processes led to the Earth ending up in its present position. ‘Why’ implicitly suggests purpose, and when we try to understand the solar system in scientific terms, we do not generally ascribe purpose to it.
Why is this beyond actually knowing? For example, so far.