Speed through space-time
Simple applet to show connection between speed through space and time-dilation effect as predicted by Special Relativity.
This shows the how an object's relative speed through space (as a factor of the speed of light) affects the object's relative speed through time (as a factor of normal time). As an example, when you are moving at 0.8 times the speed of light through space, you are moving at 0.6 times the normal rate (for someone not moving).
The movable line represents the Minkowski interpretation of SR that everybody moves through space-time at the speed of light. So if you are moving through faster space, you are necessarily moving slower through time.