Timeline for Why is space-time four dimensional?
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| Feb 16, 2015 at 14:05 | comment | added | Harry Wilson | Einstein's definitions do not show that mass (and energy and momentum and stress) "warps both space and time three dimensionally", rather they show that mass warps spacetime in a four dimensional sense. Also, a point on a curve or a "curbing curve" can still be described by a single number, such as the arclength. Consider a tape-measure twisted in space. | |
| Sep 10, 2013 at 7:14 | history | answered | user29372 | CC BY-SA 3.0 |