bonzelite: the issues you bring up are explored in detail in GR theory and cosmology. And the answers aren't trivial, nor as easily disproven as you seem to believe.<br /><br />They are, however, far more complicated than I'm able to go into at this point. Maybe in a couple of years, when/if I finish my graduate coursework.<br /><br />Lets just say one solution (or set of solutions, it may be "the" solution, not sure myself) to the GR equations dealing with an expanding spacetime has all the spacetime converging at a point, this includes <i>time</i>. This is often interpreted as the beginning of time itself, before that one can say there wasn't any (or if there was, it can't interact or affect us like things in the past normally determine the present).<br /><br />The actual dynamics or workings of the singularity are hard to grasp, and still ill defined, just as doing mathematics near a "asymtotic line" are hard to do. As you get away from that, some approximations and simplifications allow us to actually solve some of the problems and make meaningful predictions. So everything works out pretty close to the BB, just not <i>at</i> it.<br /><br />If you're unsatisfied with how the singularity itself is handled, join the crowd. Lots of people, even those that understand BB and believe it has significant merit acknowledge that it's a hard nut to crack.<br /><br />Now, as for the question of what evidence there is for the BB: Expansion (though BB was developed in reaction to that, so it doesn't count much). CMBR is a significant piece of evidence, because BB theory predicted it's existence, it's shape, and initial estimates were close to it's observed values. Over time a better understanding of the science that goes into those estimates allowed it to be refined (basically the calculations were done with better information, better approximations, allow for less error and more accurate answers). The re-calculated answers were actually closer to the observations. This is <div class="Discussion_UserSignature"> <p align="center"><font color="#c0c0c0"><br /></font></p><p align="center"><font color="#999999"><em><font size="1">--------</font></em></font><font color="#999999"><em><font size="1">--------</font></em></font><font color="#999999"><em><font size="1">----</font></em></font><font color="#666699">SaiphMOD@gmail.com </font><font color="#999999"><em><font size="1">-------------------</font></em></font></p><p><font color="#999999"><em><font size="1">"This is my Timey Wimey Detector. Goes "bing" when there's stuff. It also fries eggs at 30 paces, wether you want it to or not actually. I've learned to stay away from hens: It's not pretty when they blow" -- </font></em></font><font size="1" color="#999999">The Tenth Doctor, "Blink"</font></p> </div>