Wolf:

Well said!

The notion of mass curving space-time has always intrigued me, because I find it disconcerting to understand what it is being curved "in". Perhaps it is being curved in the mind of God? Or will we someday again find that to be an unnecessary hypothesis? :D

In any case it is a hypothesis that raises many more questions than it answers.

Curved spacetime also raises questions about what "mass" really is, or perhaps more accurately what space actually is. Is mass a densification of space?

A