Lawrence M. Krauss - The Physics of Star Trek (1995)

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There is a maxim about the universe which I always tell my students: That which is not explicitly forbidden is guaranteed to occur.

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
While everyone of us is a time traveler, the cosmic pathos that elevates human history to the level of tragedy arises precisely because we seem doomed to travel in only one direction - into the future.

Lawrence M. Krauss
Physics progresses not by revolutions, which do away with all that went before, but rather by evolutions, which exploit the best about what is already understood. Newton's laws will continue to be as true a million years from now as they are today, no matter what we discover at the frontiers of science.

Lawrence M. Krauss
While every one of us is a time traveler, the cosmic pathos that elevates human history to the level of tragedy arises precisely because we seem doomed to travel in only one direction — into the future.

Lawrence M. Krauss