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Sean M. Carroll • The Biggest Ideas in the Universe: Space, Time, and Motion
“the set of all microstates that look the same to a macroscopic observer.”
Sean M. Carroll • The Biggest Ideas in the Universe: Space, Time, and Motion
Einstein’s breakthrough was to take this feature of gravity—all particles fall at the same rate in a gravitational field—and extend it to a general principle.
Sean M. Carroll • The Biggest Ideas in the Universe: Space, Time, and Motion
This is the famous metric tensor,
Sean M. Carroll • The Biggest Ideas in the Universe: Space, Time, and Motion
Grand unification and its even grander super-extensions all point to the stunning conclusion that the relative strengths of the particle forces, the masses and species of particles, and perhaps even the mere existence of matter and forces aren’t mathematical truths carved in stone but fossil relics of an ancient and largely hidden epoch of evolutio
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