Hubble’s law: There is a linear relationship between recessional velocity and galaxy distance. Namely, galaxies that are ever more distant are moving… - Lawrence M. Krauss

I cannot overstress the importance of the fact that, once gravity is included in our considerations of nature, one is no longer free to define the total energy of a system arbitrarily, nor the fact that there are both positive and negative contributions to this energy…I say this because it have been argued that the statement that the average total Newtonian gravitational energy in a flat, expanding universe is arbitrary, and that any other balue would be just as good, but that scientists ‘define’ the zero point to argue against God. So claimed Dinesh D’Souza, anyway, in his debates with Christopher Hitchens on the existence of God.

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.

The forces that govern our experience, electromagnetism and gravity, are blind to the distinction between left and right. No process moderated by either force can turn something such as your right hand into its mirror image. I cannot