Special relativity explained in under three minutes
Visualization of Einstein's special relativity
Do you really understand Einstein’s theory of relativity? - BBC News
What is the difference between Special Relativity and General Relativity?
Relativity of Simultaneity | Special Relativity Ch. 4
In physics, special relativity is the generally accepted and experimentally well-confirmed physical theory regarding the relationship between space and time. In Albert Einstein's original pedagogical treatment, it is based on two postulates:The laws of physics are invariant in all inertial systems.
The speed of light in a vacuum is the same for all observers, regardless of the motion of the light source.