Lawrence M. Krauss - Light Quotes

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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.

Lawrence M. Krauss

Now, since the time of Newton there had been a debate about whether light was a wave—-that is, a traveling disturbance in some background medium—-or a particle, which travels regardless of the presence of a background medium. The observation of Maxwell that electromagnetic waves must exist and that their speed was identical to that of light ended the debate: light was an electromagnetic wave.

Lawrence M. Krauss