# Einstein #### Relativity [Principle of Relativity](Principle%20of%20Relativity.md) #### Special Relativity [Special Relativity](Special%20Relativity.md) #### Absolute Space and Time * https://www.youtube.com/watch?v=Y5mzvHrvMwg&feature=youtu.be * https://www.youtube.com/watch?v=coPD3h8Iidc&feature=youtu.be * http://nautil.us/blog/-this-is-why-understanding-space-is-so-hard * https://gisgeography.com/great-circle-geodesic-line-shortest-flight-path/#How_geodesics_work