Full Idea
Unlike time, space has three dimensions and lacks a distinguishing direction; unlike space, time seems to be specially connected with causation.
Gist of Idea
Space is 3D and lacks a direction; time seems connected to causation
Source
Theodore Sider (Four Dimensionalism [2001], 4.5)
Book Reference
Sider,Theodore: 'Four Dimensionalism' [OUP 2003], p.87
A Reaction
These strike me as nice reasons to doubt (what I already prima facie doubt) that there is a single manifold that is 'space-time', for all that twentieth century physics tells us it is so. A century is a mere click of a clock where truth is concerned.