Tim Campbell will provide a simplified understanding of four-dimensional space-time and will provide some evidence to support it including methods to graphically work out space-time distortions without the use of math. It starts with exploring historical ideas about light, both the nature and speed of light, and how those ideas evolved through experiment to the understanding generally accepted today. This includes some of the strange aspects whereby different observers always measure the speed of light to be the same regardless of their reference frames — leading to the understanding that space-time is warped.