1. Where did the physical matter that comprises the Universe come from?
Elsewhere
2. How far does it extend?
To the end.
3. How long has it existed?
Since the beginning.
Bonus question:
4. How high is 'up'?
125 miles. After which it becomes 'out'...
51 posted on 05/18/2007 9:41:04 AM PDT by null and void
(The truth. It is a beautiful and terrible thing, and should therefore be treated with great caution.)