There is no answer to this question. Relativity simply allows one to calculate how much curvature is created in a particular mass configuration, and what the re

There is no answer to this question. Relativity simply allows one to calculate how much curvature is created in a particular mass configuration, and what the resulting gravitational forces are. It doesn't try to explain why the curvature occurs. This link explains it better than I did: http://www.thenakedscientists.com/forum/index.php?topic=38879.0 http://www.thenakedscientists.com/forum/index.php?topic=3887...