[neutralino]

Originally Posted by Tina 2) If BB is true - there must have existed a "spaial area" that the Universe banged into - and what is the spacial area it potentially further expands into.

If one thinks of the big bang as a conventional explosion, then yes, this is true. But, cosmologists do not think of it as an explosion; that is they do not think of it as an explosion of something into space, and further do not conclude that there must be some space that this stuff is expanding into.