Introduction to the Theory of Relativity

A series of elementary, informal, and almost equation-free articles descibing the Theory of Relativity in physics.

1. Part I: History This described the history of ideas in the development of relativity.
2. Part II: Special Relativity This described Einstein's Special Theory of Relativity.
3. Part III: General Relativity This gives at least a taste of Einstein's General Theory of Relativity, which extends the Special Theory to cases involving acceleration and gravity.
4. Part IV: Implications, Controversies, and Miscellany This will address implications of the Theory of Relativity, controversies both old and modern, experimental evidence, and anything else that isn't covered in the first three installments.