By A Mystery Man Writer
When Einstein developed his Special Theory of Relativity, he assumed that light travelled at the same speed between two points no matter which direction it was moving in. But is that really the case, and would the Universe look any different if it were not?
There's Only One Way To Beat The Speed Of Light, by Ethan Siegel, Starts With A Bang!
Distant Starlight Answers in Genesis
One-way speed of light
Can we measure one-way speed of light?
What is the speed of light in meters per second? - Quora
Can you measure the one way speed of light without synchronised clocks?, Page 1
Measuring the One-Way Speed of Light
Why no one has measured the speed of light [Veritasium] : r/Physics
Speed of light, Definition, Equation, Constant, & Facts