+Light speed is the constant velocity at which all massless particles and [Electromagnetic Waves](/wiki/electromagnetic_waves) travel in a vacuum. It is a fundamental [Physical Constant](/wiki/physical_constant), the universe's ultimate speed limit, shaping the fabric of [Spacetime](/wiki/spacetime).
+## See also
+- [Relativity](/wiki/relativity)
+- [Photon](/wiki/photon)
+- [Time Dilation](/wiki/time_dilation)