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Topic: Fundamental Theory

What theories endeavor to explain how the physical world works? How did Einstein's work change our understanding of the cosmos? What can we learn by studying subatomic particles? Why do scientists believe the universe is expanding? What is string theory? Explore these questions and more in this collection of Fundamental Theory resources.

Resource Highlight

Frames of Reference

Frames of Reference

Type: Flash Interactive

Explore how different frames of reference affect your perception of motion in this interactive activity from the American Museum of Natural History.