A Civilization advance.
In its essential form, physics is the study of the many forms of matter and energy and of the way they interact with themselves and each other. The earliest physics was limited in scope to phenomena that were open to personal observation and experiment: motion, light, sound, and the like. The development of observing instruments quickly expanded physicists' horizons, as it has continued to do. Discoveries in physics rarely have direct application, but they reliably lead to advances in technology and in our understanding of the universe.
Prerequisites: Navigation and Mathematics.
Allows for: Steam Engine, Magnetism, Flight, and Atomic Theory.

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