Thanks to Kathleen M for finding a fabulous animated gif that is connected to the Grid of Clocks we were discussing at the end of Lecture. • Animated GIF illustrating the difference in local clock rates near a mass. This is a great illustration of "lower is slower"! The graphic also looks like our "Grid of Signposts" visualization of Schwarzschild coordinates (t,r,φ), but it is not ... it is the perfect jumping-off point for further discussion of this important topic. :-) The bending of the grid lines will also require quite some discussion.